Vietnam Stick With Familiar Core for FIFA ASEAN Cup: Kim Sang Sik's Five-Day Gamble

On August 14, sitting in a France Bleu Paris studio, I listened again to the recording of the final that Vietnam's national team had won. Outside in the hallway, my French colleagues were still arguing about the last summer transfer deals. In my headphones, a source close to the coaching staff came through, brief: Kim Sang Sik has exactly five days before the opening match against the Philippines at the FIFA ASEAN Cup 2026. Five days. That is enough for a European team to recover physically, enough for a club to prepare a registration list, but never enough to build a playing identity from scratch. And when that news arrived alongside two serious injuries in midfield and on the left flank, I understood that we were watching a gamble — not a gamble of greed, but a gamble of caution.

I have felt that before, more than twenty years ago. In 2026, when I was the youngest assistant editor at Radio France Bleu, I read an unverified article and broadcast that Ronaldinho was about to sign for Manchester United. Thirty-six hours later, the truth surfaced, I received seventeen listener complaints, and that night I sat down to write a two-page apology letter. My lesson was this: "France Bleu taught me one thing: unverified, off the air." Today, before Kim Sang Sik's personnel decision, I once again stand in a similar situation — where the truth lies scattered across fragmentary pieces of information, while the rumor has already run one step ahead of the press.

This piece is written for Vietnamese fans from a particular distance. From Paris, I can read European data-house tactical reports and still be close enough, through internal calls with V.League colleagues, to understand the logic behind every sigh in the coaching room. And what I want to do today is clear: "To read a deal you don't need to listen to rumor, you only need to watch where the money flows." But at the national-team level, "money" is not a transfer budget — it is the flow of time, the flow of injuries, the flow of form. None of it can be bought, borrowed, or mortgaged. That is the real cash flow of this game.

The setting is a competition staged by FIFA for the first time in Southeast Asia, under the name FIFA ASEAN Cup 2026. Vietnam come in as regional defending champions, holding a core that has been built over years under a Korean head coach, and — by his own words — with an ambition to find new options. But the calendar does not allow that dream to bloom. Indonesia is the host, meaning Vietnam will be the away side in a stadium atmosphere that carries real pressure. The Philippines are the opening opponent, difficult enough to unsettle the mood but not strong enough to permit mistakes. Meanwhile, two pillars — Nguyen Hoang Duc in midfield and Nguyen Van Vi on the left flank — are expected to miss out through injury.

Let us talk about what actually happens on the pitch, because football is always decided there. In this context, the familiar core acts as an insurance shield. Kim Sang Sik chooses to keep players who already understand his system, already understand one another, already know how to run and cover without needing much rehearsal. Technically, that means Vietnam will experiment less, stabilize sooner, and use preparation time as an opportunity to fine-tune rather than to build. But it also sets a very clear ceiling: you cannot change a playing identity in five days. You cannot switch from possession-based football to rapid counterattacking in five days. You can only maintain and reinforce what already exists.

That is why Hoang Duc's injury is a systemic loss, not merely the absence of a good player. His role for Vietnam is to retain the ball, break the press, and organize tempo. He is the pressure-release valve, the man who stands between the opponent's press and his teammates' passes. Without him, the team tends to play more directly, hit longer balls, and drift into a passive posture against compact defensive blocks. That loss cannot be compensated by simply replacing one player; it can only be offset by a functional reallocation across the whole system. This is the kind of loss no xG model can measure precisely, because it lives in the gaps between actions.

The left flank is the same. Nguyen Van Vi is not just an attacking full-back; he is a two-way channel shaped over many years. When the left side loses that link, the team not only loses a cross into the box, it loses the ability to overload a flank — an important tactical concept in modern sides. The replacement option, Cao Quang Vinh, is a different profile, a different dimension. He may do the defensive work well, but reproducing Van Vi's attacking output on the left will take time, and that is precisely what Vietnam do not have.

Vietnamese fans will surely remember Euro 2026, when I was invited onto a national radio tactical analysis show. At the time, I noticed that audiences no longer wanted to hear about 3-5-2 shapes or high pressing. They wanted to feel tactics through human stories. I proposed a format change: for each match, I went to a Paris café, interviewed three fans about their emotions, and linked those emotions to the coach's tactical decisions. The show posted its highest rating that summer. I tell this story to say that tactics are not a dry spreadsheet — they are an emotional narrative. And Vietnam's current story is the story of a baker on Rue 14 who patiently proofs the dough before baking. Kim Sang Sik is the same. He is proofing an old core, but he has no time to bake a new one. Not because he wants it that way, but because the oven has been set on a timer.

"A contract is the record of greed, but it is also the diary of hope." Here I am not talking about a transfer contract, but about the "time contract" between a coach and the federation, between a coach and clubs. Five days of preparation is not purely Kim Sang Sik's choice. It is the outcome of a calendar negotiation between the federation, V.League clubs, and international commitments. When you say five days, you are talking about a tangle of club interests and national-team duties, of a coach's preparation needs and a club president's need to keep his stars. In the eyes of fans, it is just a number. In the meeting room, it is a battle.

Let us look at verifiable numbers. Vietnam enter as regional defending champions, having won the most recent ASEAN Cup. That is a traceable, verifiable fact, and it shapes the entire public expectation. But attached to that title is an important footnote — this same team, in recent matches, has played "unconvincingly." This is what analysts call results outrunning process. Winning without impressing. Championing while worrying. And when results outrun process, expectation becomes a double-edged sword. Fans do not only want to win — they want to see how the team wins. They want a side that is improving, not one trying not to regress.

It is precisely at this moment that Kim Sang Sik's decision to keep the core carries both sides. On the positive side: stability, confidence from players who know one another, and the reasonable caution of a coach squeezed for time. On the negative side: predictability. A team playing the same core gives opponents a stable reference to plan against. In a short group stage followed by knockouts, predictability is one of the most dangerous risks. In my experience watching international matches, teams that get read and lose in extra time often share one sign: they win because of identity, then get eliminated because that identity has been decoded.

Here we should also discuss the return of the Hanoi Police FC players. Nguyen Filip in goal and Cao Quang Vinh at left-back are expected to return to the national team, and this carries an important signal about the V.League ecosystem. Hanoi Police FC are asserting themselves as a well-resourced club that produces national-team players. As Southeast Asian clubs compete ever harder financially, having a domestic club remain a "pipeline" to the national team is a positive signal. It shows the talent flow remains stable, undisturbed by noisy transfer windows.

The goalkeeper competition also merits discussion. With Nguyen Filip back, the race for the number-one spot will become fiercer. In the short term, this can create healthy pressure, forcing candidates to train and perform at the highest level. But in the medium term, if the coach does not soon identify a first-choice keeper, rotation can destabilize the whole defensive system. For a team with little preparation and missing pillars, stability in goal matters more than ever. In my experience watching regional tournaments, a side that changes keepers mid-tournament often struggles to retain defensive organization — and that is a risk the coaching staff must resolve before kickoff.

Now I want to discuss an aspect Vietnamese media often overlooks: the naturalization route for overseas Vietnamese players. Adou Minh and Kyle Colonna, two overseas Vietnamese players, recently obtained Vietnamese citizenship. Financially, this is a low-cost talent-acquisition channel. No transfer fee, no auction on the market, only administrative and adaptation costs. In a context where the value of young Vietnamese players is rising and Southeast Asian clubs are competing ever harder, the diaspora route is a financially smart solution. But it is not a simple technical solution, because FIFA's eligibility recognition process is complex, involving rules on nationality, residency, and one-time switching.

Reading the money flow of this naturalization story is not hard. If the federation fast-tracks citizenship for overseas Vietnamese players before the registration window, that is a move aimed at two targets: strengthening squad depth and reducing long-term talent-acquisition costs. This is behavior consistent with a federation that wants to compete regionally while controlling budgets in a period of uncertain economics. In my experience tracking transfer markets, federations that take this route tend to bet on defensive depth first — because that is the cheapest place to buy stability.

However, the story also raises questions the press must place correctly. The biggest question is: do these overseas Vietnamese players fully satisfy FIFA conditions? This is a regulatory question, not an emotional one. Historically, several Asian federations have gotten into trouble by fast-tracking naturalization without carefully checking residency and one-time-switch conditions under Articles 5–9 of the Regulations Governing the Application of the FIFA Statutes. Vietnam, if it wants this route to become a sustainable channel, needs an independent verification process before announcing the squad. "An insider is not the person who knows the most, but the person who stays calmest when everything collapses." In this case, staying calm means checking carefully before trusting a document that favors you.

What if the FIFA process takes longer than expected? The team could lose two important depth options. The federation would face media questions about how it fast-tracked the process and on what basis. And if one of the two players is ineligible, the story becomes a lesson about not betting on the unconfirmed. That is exactly the lesson I learned at twenty-three, when I went on air with the Ronaldinho story without verification.

Now let us turn to the organizational and management dimension. Kim Sang Sik is in the third phase of his tenure with Vietnam. He has built a solid core, delivered a regional title, and created a clear power structure in the dressing room. But every coaching career has an inflection point: once you have succeeded with a core, it becomes hard to change that core for fear of risk. This is the generational-transition trap many coaches have faced. He has publicly spoken of wanting to find new options, but the calendar does not permit it. And when you voice a desire without acting on it, you create a gap between word and deed — a gap the media, willingly or not, will exploit when results disappoint.

This issue is more complicated for Vietnam. The old core is not necessarily a young core. Many pillars are entering the mature phase of their careers. Delaying generational transition does not mean transition is unnecessary. It means the transition will happen later, more compressed, and therefore more painful. This is one of the common paradoxes in international football: successful teams find it hard to renew, failing teams are forced to renew, and teams stuck in the middle need coaches with long-term vision.

For me, Kim Sang Sik is the "careful craftsman" type of coach. He is not an innovator; he is an organizer. He works with existing materials, fine-tunes them, uses them economically. In the context of a short tournament with a truncated preparation window, this type is the right choice. But if Vietnam want to maintain regional leadership for years to come, the federation will need a strategic architect more than a craftsman.

What I consider the biggest blind spot in the official narrative is the tournament structure. The competition is hosted in Indonesia — regarded as one of Southeast Asian football's cauldrons. This is a clear strategic disadvantage for Vietnam. As the away side, you face crowd noise, referees potentially influenced by host pressure, and factors like weather and pitch. With only five days of preparation, having to adapt to an unfamiliar competitive environment is a compounding difficulty. Set pieces and crowd-resistant defending will become two more important skills than ever. Any coach who has worked at international level knows that playing away in a big match usually means making the most of set pieces — the kind of moment unaffected by a roaring crowd.

In Indonesia, where football is part of national identity, the hosts will play with the backing of the stands and enormous expectation. For Vietnam, this is a thorough psychological test. The team must prepare for moments when referees must make hard decisions amid the noise of tens of thousands of fans. Those are moments where preparation is not only technical but spiritual. And for a side with only five days of preparation, building that spirit is not easy.

Now I want to address a contradiction many fans feel but few name correctly. Vietnam stand as both defending champions and unconvincing performers. This is a position analysts call results running ahead of process. In data models, it is a sign of a team that has been more fortunate than powerful in a tournament, and likely to be corrected by regression to the mean. But in football, data never tells the whole story. Some teams win because they are patient, not lucky. And some teams win because they have a coach who knows how to make average players perform above average. Vietnam's case does not easily fit either category. I believe the truth lies in between: the team has the quality to be champions, but not enough strength to build a new playing identity in a short time.

And this is where my view diverges from much public opinion. Many believe keeping the same core is correct caution, suited to circumstance. I do not dispute that. But I want to look deeper at another angle: the decision to keep the core is not only technical, it is political. When you keep the core, you send three messages. To young players: the path to the national team will be harder. To clubs: the current priority is stability rather than development. To fans: the team will play with what has been verified. All three messages are reasonable in the short term, but all can cause long-term damage if not supplemented by a clear transition roadmap.

For young players, they need to see that the path to the national team remains open. If not, development motivation at club level will decline, and the whole game will suffer. For clubs, they need to see that investing in youth will pay off. If not, they will redirect investment to foreign players who are cheaper. For fans, they need to see that the team is evolving, not standing still. Some fans will be satisfied with stability, but others will feel the team is missing a chance to renew itself.

In football, decisions like this are never made in a vacuum. They always reflect a power structure, a vision of the future, and a balance between risk and benefit. For Vietnam, the decision to keep the core reflects the current balance: between fan expectation and the team's realistic capability, between the requirement for short preparation and the desire for patient renewal, between present stability and future development.

Now let us talk about what may happen on the pitch. The opening match against the Philippines is not an easy game. This is a side with reasonably good defensive organization and an ability to exploit mistakes. In recent meetings, the Philippines have often played with a low block, waiting for counterattacking chances. That means Vietnam will face a crowded defense and limited space. Without Hoang Duc — the ball retainer and press-breaker — the ability to create from central areas will decline. This may push Vietnam to attack more down the flanks, or to use more long balls to break the opposing line.

Both options carry risk. Attacking the flanks without Van Vi means the left side will be weaker unless Cao Quang Vinh can raise his attacking output in a very short time. Long balls depend on the strikers' dueling ability and the attacking midfielders' reading of situations. This is not an option Vietnam have been trained in for years, and it can open space for the opponent to counter.

Conversely, the Philippines have weaknesses. They are not a high-scoring side, and they often depend on individual moments. If Vietnam stay focused defensively and deny space behind, the chance of winning is high. But that is exactly where the losses on the left flank and in midfield matter — because those are the two key positions for maintaining defensive focus and organization.

Psychologically, the opening match always carries special meaning. A win builds confidence for the next games. A draw or loss will raise questions about Kim Sang Sik's decision to keep the core. And as Vietnamese media increasingly ask hard questions, a poor opening result can quickly turn into a public debate about the team's strategic direction.

This is where I want to return to my France Bleu lesson. When I reported incorrectly about Ronaldinho, I learned that credibility is built through small details. One false piece of information can damage the credibility of an entire column. In Vietnam's case, a coach's credibility is also built through small decisions. If the team wins, keeping the core will be seen as wise. If the team loses, it will be seen as lacking ambition. But the truth usually lies in between, and truth is usually not decided by the result of a single match.

Another question needs asking: does keeping the core affect the morale of young players in the squad? In my experience watching national teams, stability in selection does not necessarily reduce young players' motivation. What matters is how the coach communicates with them. If the coach clearly says "you are not ready, but you will get a chance," young players keep their motivation. If the coach simply does not select them and says nothing, motivation declines. In Vietnam's case, Kim Sang Sik has publicly spoken of wanting new options. But wanting is not enough. A concrete roadmap is needed so young players know they are being tracked and will get future chances.

This links to a broader theme: the sustainable development of Vietnamese football. If the national team relies only on an old core without building a transition roadmap, current success will not be maintained. Conversely, if the federation and coach build a clear talent-development system, current success becomes a foundation for future success. This is a lesson any football nation must learn. In modern football, successful nations all have a continuous talent-development system, not just one special generation.

Now let us address the most important aspect the earlier analysis highlighted as a blind spot in the official narrative: the lack of data. In the analysis I read from source materials, there is a clear note: process data such as xG, PPDA, and possession share were not provided. This means we are analyzing a team without the standard measuring tools of modern football. This is a major limitation. Without xG, we do not know the team's true attacking capability. Without PPDA, we do not know its pressing capability. Without possession share, we do not know its true playing style. Every tactical judgment becomes conjecture.

Faced with this data deficit, I choose to admit my limits. I do not want to be an analyst drawing strong conclusions from weak data. That is also the France Bleu lesson: admitting what you do not know is part of professionalism. As a reporter, I want to state clearly that every conclusion in this article is offered at a certain confidence level, and conclusions without sufficient basis I will not draw.

This does not mean we cannot analyze Vietnam. We can analyze based on what has been revealed: the decision to keep the core, the absence of Hoang Duc and Van Vi, the return of Hanoi Police FC players, and the naturalization route for overseas Vietnamese players. From these facts, we can offer judgments at low-to-medium confidence, and place them in the context of an increasingly competitive regional competition.

So what should Vietnam do in five days of preparation? I believe four things matter. First, clearly define the defensive system and organization against the opponent. In a short window, defending well is easier than attacking coherently. Second, decide on the first-choice goalkeeper and split roles clearly, to avoid rotation-driven instability. Third, build flank-attacking and set-piece options, because these are two scoring channels that can be deployed quickly. And fourth, prepare the players psychologically so they can play in a high-pressure stadium atmosphere.

But more importantly, the coaching staff must build a flexible structure to adjust tactics mid-tournament. In a short tournament with consecutive matches, flexibility is a survival condition. Teams that play only one style often get eliminated in the knockouts because opponents have figured them out. Flexibility is not improvisation; it is a set of prepared options that can be deployed by situation. This is where Kim Sang Sik's experience as a regional-level coach can pay off.

Finally, I want to address what I consider the most important point for Vietnamese fans: that success is not a result, but a process. Vietnam have won the region. But that success only matters if it becomes a foundation for further success. If it is only an isolated peak, it will not help Vietnamese football's future. What I want to see is a team that keeps developing, keeps building, keeps opening the path for the next generation. And if the decision to keep the current core is part of a bigger plan like that, it will be remembered as a necessary step, not excessive caution.

I think of the young players in Vietnam's football academies, training every day with the hope of one day wearing the national shirt. They are looking at the current team not only to learn, but also to see whether their path is viable. If they see a closed core with no room for change, their motivation will decline. But if they see a core that is opening, gradually being supplemented, with a clear succession roadmap, they will have faith in the future. This is the responsibility of the coaching staff and the federation, not only of the players.

I think of V.League clubs investing in young players and waiting for the chance to send them to the national team. They need to see that investing in talent development has value. If they see the national team relying only on an old core, they may lose the motivation to invest in youth and turn to cheaper foreign players. This could weaken Vietnamese football's foundation in the long run.

I think of the fans, who have followed the team through so many ups and downs, and who are waiting for progress. They do not only want to win; they want to see their team heading in the right direction. They want to see development, not just short-term results. For them, FIFA ASEAN Cup 2026 is not just a tournament, but a chance for Vietnam to assert a new vision, a new way of playing, a new future.

What I want to say here is simple: FIFA ASEAN Cup 2026 is not the final destination. It is part of a longer journey. And on that journey, every personnel decision, every match, every result carries meaning. But the true meaning of those decisions is not in the final result, but in the direction they open for the future.

When I look back on my career, I realize the most important moments were not moments of success, but moments of learning. Those were the moments when I realized I had been wrong and needed to change how I worked. This is also what Vietnam and their coaching staff can learn. No path is perfect. No tactic is invincible. What matters is the ability to learn, adapt, and improve.

And what I want to say to Vietnamese fans is: be patient. Look at the team not only through the result of one match, but through the direction they are choosing. If they choose stability as a springboard for renewal, that is a reasonable choice. If they choose stability as a stopping point, that is a choice we should question. But the right to question belongs to the fans, and the responsibility to answer belongs to the coaching staff and the federation.

In football, nothing is certain. A team can win because it has a strong core, or lose because it lacks renewal. A coach can be praised for caution, or criticized for lack of boldness. No formula is right for every case. The only thing we can do is analyze based on what we know, admit what we do not know, and accept that football always contains an unpredictable part.

That is also the lesson I learned at twenty-three, in a France Bleu studio. Football is not a problem with a single solution. It is a story with many ways of being told. And the best way to tell it is not the simplest way, but the most honest way.

For Vietnam, their FIFA ASEAN Cup 2026 story will be written by matches, by moments on the pitch, by personnel decisions. And whatever the final result, that story will be part of a larger journey — a journey in which we, the lovers of Vietnamese football, are all participants.

Before closing this piece, I want to add something I consider important. Football is not just a game. It is part of national identity, part of collective memory, part of the dreams we share. When Vietnam walk onto the pitch, they represent not only a group of players, but a country, a people, a history. And their responsibility is not only to win, but also to inspire the next generation.

I believe Vietnam are capable of inspiring that. The current core has proven it through a regional title. But to inspire sustainably, they must keep improving. They must find new ways to play, new ways to win, new ways to connect with fans. And that is a long-term task, not a tournament-sized one.

FIFA ASEAN Cup 2026 will be an important test. It will tell us whether Vietnam are capable of maintaining regional leadership in an increasingly competitive landscape. It will tell us whether Kim Sang Sik's strategy of keeping the core is enough to bring success. It will tell us whether the naturalization route can become a sustainable talent channel. And it will tell us whether the current generation can pass on what they have learned to the next.

But whatever the result, I believe Vietnamese football is on the right path. The growth of the V.League, the emergence of overseas Vietnamese players, and the professionalization of youth training systems are all positive signs. What is missing is an overarching strategy, a long-term vision, and a commitment to sustainable development. If those are added, I believe Vietnamese football will go even further.

Finally, I want to return to my personal story. In 2026, when I reported incorrectly about Ronaldinho, I learned that credibility cannot be bought, only built through caution and honesty. For more than twenty years since, I have applied that lesson to every piece I write. And now, speaking about Vietnam, I want to apply that principle too. I do not want to make certain predictions about results. I only want to analyze what I know, admit what I do not know, and share what I believe is true.

That is precisely the approach of a football economist in France, who has learned that truth is never simple, and credibility can never be traded. And that is also my approach to Vietnam, a team I love not only for their wins, but for the stories behind those wins.

So let us wait and see. Let us wait to see what Kim Sang Sik and his players can do in five days of preparation. Let us wait to see whether the familiar core can carry Vietnam through the challenges at FIFA ASEAN Cup 2026. Let us wait to see whether young players get their chances, and whether the naturalization route brings quality players to the team. Let us wait to see whether Vietnamese football can maintain regional leadership and take another step toward the continental and global stage.

I will be watching, from Paris, where I live and work, as a reporter, an analyst, and a lover of football. And I will try to learn from every match, every decision, every story, because that is the only way to become a better reporter, a better analyst, and a more knowledgeable person about the sport I have spent my life pursuing.

And while waiting, let me restate my story: that football is not a problem but a story. That the most beautiful story is not the story of wins, but the story of the people behind the wins. That truth, however uncomfortable, is always the foundation of anything worthwhile. And that, as lovers of Vietnamese football, we have the right to demand honesty, transparency, and a long-term vision from those leading our team.

That is what I believe. And that is what I expect from FIFA ASEAN Cup 2026 — not only wins, but lessons that help Vietnamese football travel further along its road.