Kim Sang Sik's Week of Mourning and Vietnam's Hidden Structural Test Before the 2026 ASEAN Cup

Busan, 2 a.m. Korean time. I am sitting in front of a screen with my third cup of coffee, pulling up the footage of Vietnam's most recent qualifier against Thailand. Not because I enjoy punishing myself. Because a single line of news hit me just as I finished rewinding the 71st-minute counterattack: Kim Sang Sik's father had passed away, the coach had to fly home immediately, and the Vietnam Football Federation had issued a formal message of condolence. The father was 84, dying after a long illness.

Roughly one week of mourning. That is the window the Vietnamese press has reported. Nobody has confirmed the exact figure. And it is precisely that uncertainty that keeps me awake.

Because there is another number I am certain about. Ten. Vietnam have roughly ten full days of preparation left with their head coach before the 2026 ASEAN Cup kicks off on 24 September. That is not a statistic I invented. It is a subtraction anyone familiar with the FIFA calendar can perform. And that is why I cannot sleep.

Let me say this directly before anyone rushes to call me heartless about a man grieving for his father. People hate me because I say it first, and then they look for me when I turn out to be right. The death of a father is a private tragedy and deserves absolute respect. But a national team's preparation is a structural, collective problem. The two can happen at once without forcing us to choose which one to discuss. A decent analyst must address both, and must address both properly.

Let me start with the context most reports have stripped out.

One man, two countries, and a coaching staff that is mostly Vietnamese

Kim Sang Sik took charge of Vietnam in May 2026, succeeding Philippe Troussier amid a furious public mood after a string of disappointments in the 2026 World Cup qualifiers. Unlike his French predecessor, Kim arrived with the profile of a long-time K-League assistant who had coached South Korean youth teams, not a tactical celebrity. He is an organiser. He is a foundation-builder.

That distinction matters more than it looks. A coach who arrives to restructure is usually judged by what he leaves behind after two years, not by the jolt of his first match. Over the eighteen months of his tenure, one recurring note in the Vietnamese press stands out: Kim is described as someone who pours everything into his work, running the U23 and senior national teams in parallel, and delivering strong results in regional and continental competitions.

That phrase, pours everything into his work, appears far too often in the coverage. In the Korean football journalism I grew up around, it is a kind of code for something deeper. A man who never stops working is usually trying to prove something to himself. Or papering over some hole. I have no right to psychoanalyse a man I have never interviewed. But I do have the right to note that the way a person works often tells a story they do not speak aloud.

What the reports have almost entirely skipped is the structure of Vietnam's current coaching staff. This is the point I want readers to remember, because it is the knot of the whole story. Vietnam operate with a staff staffed mostly by Vietnamese assistants, alongside a handful of foreign specialists in specific roles. That is a correct long-term decision by the Vietnam Football Federation, because it builds domestic capacity instead of relying entirely on outsiders. But it is also a short-term risk, and that short term is happening right now.

I will return to this in the core analysis. First, though, the federation's response, because there is something genuinely praiseworthy here.

The VFF handled this properly, and I owe them applause

The VFF president personally encouraged Kim Sang Sik to return home to handle the funeral. The federation's statement said they hoped coach Kim Sang Sik and his family could find the strength to get through this immense loss.

Every word of that statement is carefully placed. No performance pressure. No line like we believe he will come back stronger, or we hope he will stabilise his mindset soon. Just clean, well-placed sympathy, with no smell of governance about it. In crisis-communications terms, this is a high-grade response. Plenty of federations in Asian football would not have handled it this elegantly. They would either have gone conspicuously silent or issued a statement with a veiled hint about the fixture schedule.

I have followed Southeast Asian football for years and I have seen federations handle similar situations far worse. A foreign coach loses a relative back home, the federation stays silent and leaves him to fend for himself. A coach loses a relative just as the team is preparing for a decisive match, and the federation quietly asks whether the funeral can be postponed. This is not rare. This is real.

Vietnam doing the opposite, publicly, clearly, and in the correct tone, tells me something about the working environment Kim Sang Sik enjoys. A coach is willing to give everything to a federation when he feels treated as a person rather than an asset. And that, in the end, may matter more than a few tactical sessions.

But this is where I have to move into the hard part.

Sixty to seventy percent of the story lies in the delegation structure nobody discusses

I have re-watched all 11 of Vietnam's recent matches under Kim Sang Sik using footage I collected myself over more than a year. I did not use data from any analytics provider. I sat, I watched, I took notes, and I counted by hand. This is slow, but it gives me something spreadsheets cannot: the feel of a team's rhythm, how they react when they trail, the way players glance toward the touchline.

Across those 11 matches, I counted full tactical sessions ahead of each competitive game. On average, Vietnam had roughly five to seven. Comparing with Southeast Asian peers at the same level, Thailand or Indonesia for instance, the number ranges from four to six. Structurally, on time, Vietnam have a slight edge. No doubt about it.

But here is the thing I need you to remember, and I will bold it because it is the heart of this piece: extra preparation time is worthless if the person who designs the sessions is not in the room.

Modern football runs on a coaching structure, not an individual. One assistant designs defensive drills. Another handles fitness. Another studies the opponent. The head coach's job in training is not to teach every movement. It is to set the intensity bar, read the squad's emotional state, choose priorities between what can be taught and what must be sacrificed, and make the final call when assistants offer contradictory tactical options.

That is a job nobody can replace in a week.

I am not saying Kim Sang Sik's assistants are weak. I have never worked with them. I am describing a rule of professional football: an assistant who has never worked as a national-team head coach will not make certain decisions that only a head coach carries the implicit authority to make. Not because they lack quality. Because authority is granted, not spontaneously generated by talent.

Who decides to switch from 4-2-3-1 to 3-4-3 at the 60th minute when the team is being pinned back? Who decides to substitute the holding midfielder when the middle is being suffocated by pressing and the team needs experience rather than youth? These calls sound small in the meeting room. But they are exactly the kind of decisions a week without the final decision-maker can distort.

A week of work without the final decision-maker is not a normal week of work. It is a week of waiting. And in elite football, waiting is a kind of loss that never makes it into the minutes.

Look at Vietnam's Division 1 schedule at the 2026 ASEAN Cup to see why this matters more or less than you think. Group A features Thailand, the Philippines, Pakistan, and Vietnam. The Philippines and Pakistan are opponents Vietnam, as one of the region's seeded sides, are expected to beat. Thailand, of course, are the biggest rival, the tournament favourites, and the match almost certain to decide top spot.

Here is the schedule point: Vietnam's most important group match will fall somewhere in the middle of the group phase, not the opener. That means if Kim Sang Sik returns on schedule after around a week, he will have roughly ten days before the first match, and another five to seven before the bigger opponents. The effective preparation runway for the decisive games is fifteen to seventeen days. Not comfortable, but not dead time either.

I have re-watched Vietnam U23 footage from periods when Kim Sang Sik was juggling both age groups. He has a habit I noticed clearly: he sets up framework weeks, compressing core tactical work into four high-intensity sessions with lighter recovery days in between. This is standard in Korean football, where a packed K-League calendar forces coaches to optimise time ruthlessly.

Kim Sang Sik, raised in that rhythm, is not the type to panic over a shortage of time. He has worked in an environment where a week is a luxury. What will unsettle him is not the fixture list. What will unsettle him is losing people from a machine he assembled with care.

Which is where I have to argue against myself.

Why this absence could actually help Vietnam

The referee is never wrong, the law simply cannot keep up with the ball. I have built a case: Kim Sang Sik's absence creates a preparation risk for Vietnam. But there are three reasons I may be wrong, and I owe honesty about them.

First, the absence may force something Vietnam have needed for a long time: variety in on-field decision-making. In many of Kim's matches I have watched, the team tends to go passive in the opening fifteen minutes of the second half, waiting for touchline instructions instead of self-adjusting. That is the signature of a well-coached team not yet empowered enough. If, during his week away, assistants have to run some sessions independently, players may be pushed to read the game more actively. This is what I call the temporary empowerment effect. It does not replace a tactical system, but it can build a new layer of communication inside the squad.

Second, the emotional situation may create a special layer of motivation. I have seen at both club and international level that when a head coach faces personal tragedy and the squad knows it, the players' response is usually heightened effort. This playing-for-the-manager effect is well documented in sports psychology. I am not sure it is enough to beat Thailand. But I believe it is enough to add a new layer of drive in the matches against the Philippines and Pakistan, games where concentration can waver.

Third, and this is the most contentious point, a week of interruption may be good for Kim Sang Sik psychologically. He has worked non-stop for over a year, leading two national teams at two levels. Any manager at this altitude faces periodic burnout, and I can say from thirteen years observing this industry: coaches talk about it more than people think. A week in Korea, even under grief, can sometimes be a chance to step off the treadmill and return to the person underneath. When they come back, some coaches tell me they see football differently. That is a kind of spiritual reset no tactical session can produce.

So why do I still hold that this is a risk? Because risk and opportunity are not mutually exclusive. They coexist, and an analyst must hold both in mind at once instead of choosing the more comfortable one. This is not a two-sided event. It is a three-dimensional one: there is preparation risk, there is emotional opportunity, and there is a third dimension few mention. That third dimension is that Vietnamese fans must accept their national team is led by a human being, not a machine that runs to schedule.

Where I could be wrong

The hot take spoken today needs three years to ripen into a real opinion. I want to self-audit three points before closing.

First, I assume Kim Sang Sik will be away only about a week. If the funeral runs longer, or if his mother's health deteriorates after losing her husband, the window could be two weeks or more. In that case, the preparation impact shifts from manageable risk to serious risk. I cannot predict that from outside, and I admit it is the biggest blind spot in this analysis.

Second, I assume Group A unfolds along the expected script: Vietnam beat the Philippines and Pakistan, while the Thailand match decides top spot. If the Philippines, a side that has made real progress under recent foreign coaches, produce a shock in the opener, all my preparation arithmetic collapses. Football never follows the analyst's script. Football is not fair, but it is precisely that unfairness that weaves legends.

Third, I may be underestimating the strength of Vietnam's coaching staff. I have no internal data on how Kim's assistants operate, how much autonomy they have been given, or how robust the delegation structure he built really is. It is possible he designed a system any staff member can run for a few days without losing rhythm. If so, my entire concern is noise. I can only judge from public information, and public information gives me no proof either way.

What I will be watching over the next ten days

When the stadium falls silent, I hear the data whisper most clearly. The data I care about most in the next ten days is not the scoreline, nor the projected line-up. It is three things observable from outside.

One, the timing of Kim Sang Sik's return to Vietnam. If he comes back within seven to eight days of leaving, the team will be fine. If that number stretches past ten days, I start to worry.

Two, the quality of his first public session back. If he runs it with the same intensity and level of detail as before, the team's structure has not eroded. If the first session is described as light, it may signal a squad still recovering from a week of drift.

Three, and this is the subtlest indicator, Kim Sang Sik's demeanour at his first press conference. Coaches who have been through bereavement often carry a different stillness in their speech. Sometimes that stillness is strength. Sometimes it is a sign of a man not yet ready. None of us has the right to judge that. But we do have the right to observe it honestly.

What I want readers to take from this piece is not a prediction. It is a question. Why do we wait until a man loses a parent to remember he is a human being? A week's absence does not make Kim Sang Sik a poor coach. It merely makes him a man past fifty mourning his father, in a country that is not his homeland, carrying a national team on his shoulders.

I do not need the whole world to nod along with my argument. I only want someone to stop and listen. And if this week ends with Kim Sang Sik returning to Vietnam on schedule, leading the team with the calm of a man who had long prepared himself for loss, I will happily admit I was wrong. I would rather be wrong in an analytical piece than right on an afternoon when the stadium falls silent for the wrong reason.

Football is not fair. But sometimes that unfairness is an opportunity for us to treat each other with a little more decency.