The Empty Column in the Notebook: Vietnamese Football, Data, and the Unmeasured Beat

A rainy October night in Busan, rain drumming on the window of a fourth-floor apartment overlooking the port. I open my laptop; a live V.League 1 match has just entered the second half. On the desk are two notebooks — one for tactics, one for things that do not belong to tactics. On the left page, the "formation" column is already filled with four digits. On the right page, the "rhythm" column is still empty.

I sit still for a long time before that blank space. Not because there is nothing to write, but because there is too much that refuses to fit neatly into a pre-drawn box. A young player has just come on as a substitute, his hands trembling as he ties his laces. A Korean head coach stands close to the touchline, both hands in his pockets, eyes locked on the shape of the team. The stands are emptier than usual, but the drum of a small supporters' group behind the goal keeps a steady beat, as if they are holding the rhythm for the whole stadium. There are things that never show up on the scoreboard, yet they decide everything.

For twenty years in this profession, that empty column is where I have written the most. And it is also where I learned something about Vietnamese football — the football I follow from afar, from a different time zone — a paradox: the more passionate it becomes, the less data it has; the more stories it holds, the fewer people record them.

When the organizers of a major tournament prepare to kick off, journalists flood in from everywhere. I received a request to write a tactical analysis for a long feature. They sent a template — nine sections, from tactics to club finance, from results to media, from governance to risk. The template was complete. The content was empty. I looked at that template and realized it looked exactly like my notebook: lines drawn in advance, waiting for someone to write in them.

The rhythm of a football nation does not live in an analytical template, but in whoever is patient enough to sit back down after the match has turned off the lights.

When I first began following Vietnamese football seriously, I had no template at all. I had an old radio and a habit: to write everything into a notebook, even things that seemed meaningless. In 2026, I started writing for local radio stations, each bulletin three minutes long, and I learned that people do not remember data, they remember a voice. When I moved to following a Korean club in K League 2, I kept that habit. I did not write about formations, I wrote about people.

Vietnamese football, seen from Busan, appears as a current with a very clear rhythm but one that is very hard to measure. The national team wins in a regional tournament, and the whole country pours into the streets. A young player moves to Japan, and public opinion splits in two. A club changes owners, fans worry for a few weeks, then forget. Every event is a beat, but no one records when the next beat will strike.

My job is called a training-ground observer. It sounds cold, but in truth it is a job of memory. I am present at training sessions with no spectators, hearing the ball bounce on grass, hearing players curse then laugh, hearing the coach shout then fall silent. None of that makes it into the match report. But it is the rhythm. The stadium has no spectators, yet I still hear the beat of the match.

When I was sent to Russia for the 2026 World Cup, I stood in the mixed zone after South Korea beat Germany. In the 90+3rd minute, Kim Young-gwon scored. The whole zone erupted. I squeezed close and caught one line from the head coach: "We won because the players trusted each other." I wrote that line in my notebook and underlined it twice. After the tournament, I flew straight to Jakarta for two weeks, following Coach Park Hang-seo and the Vietnam U23 team. I did not record a single coherent formation. I only recorded how he stood, how he patted each player on the shoulder, how he stayed silent when his team fell behind. And I understood: in a football nation still learning to trust itself, tactics are just an excuse for people to reconnect with one another.

All those years in Korea taught me something else. Koreans analyse football the way they analyse a machine: every metric, every square metre, every second. Vietnamese people feel football the way they feel a song: hit the rhythm and it works, miss it and the whole song collapses. I stand between the two, and I see the gap between them. Busan is not the stage lights, but it taught me how to keep the rhythm.

One evening I sat in a café near the ferry terminal, watching the rain, and I heard an elderly Korean man talk about Vietnam U23 in 2026. He did not remember the name of a single player; he only remembered how the whole team ran toward the stands after the penalty shootout. He cried. A Korean man crying over Vietnamese football. That is a shared rhythm.

I tell these stories not to show off memory, but to make one thing clear about how I write. I do not write to judge right and wrong. I write to keep the rhythm. And when I looked at the nine-section template they sent me, I asked myself: whose rhythm does that template keep — or is it only there to fill space?

I decided to write this piece differently. I will walk through each section of the template, but instead of stuffing in numbers, I will point out where Vietnamese football truly has data, where it only has feeling, and where — like the right-hand page of my notebook — it is blank because no one has been patient enough to sit back down.

---

Tactics: where memory is replaced by drawn lines

The first section of the template concerns tactics and technique. Formations, styles, sophistication of execution. People usually think this is the easiest part to fill, because every football nation has formations.

But when I tried to apply that template to a Vietnamese club, I immediately hit a problem: there is not enough data to talk about the formation, only enough to talk about how people move within it.

Let me give a concrete example I once followed. In the 2026 season, I recorded every tactical training session of a K League 2 club. From March, the coach applied a formation with four defenders, two central midfielders, three attacking midfielders and one striker, and kept it unchanged for seven months. The team played 36 matches, scored 52 goals, but finished third, exactly four points short of promotion. I recorded every session in detail, especially the daily progress of an eleventh-numbered winger. Not because I was good, but because it was my job.

When I looked at a Vietnamese club of the same era, I did not have that continuity. I had scattered matches, short bulletins, a few minutes of video. I did not have a seven-month chain of notes. And without a chain, I cannot talk about "process"; I can only talk about "moments".

That is the biggest blind spot in analysing Vietnamese football from the outside. Not because Vietnamese people do not understand tactics. But because the infrastructure to record tactics — systematically, continuously, from the training ground — has not been built. Anyone who watches Vietnamese football remembers the lightning counter-attacks, the long cross-field passes. But few remember which week the team first rehearsed that counter, under what pressure, and how it changed after each defeat.

Vietnamese tactics are remembered through moments, not through process. And the memory of a moment is beautiful, but it cannot teach the next generation.

I once asked a young Vietnamese coach why he did not record his session plans. He laughed and said, why record it — the team disbands after the season, and next year there are different players. I stayed silent. I understood. But I also understood that precisely because of this, every Vietnamese season begins from zero, while a Japanese or Korean club begins from where last season stopped.

Do not mistake this for criticism. I am pointing out a gap. And that gap has historical reasons. Vietnamese football professionalized late, budgets are tight, analytical manpower is thin. The clubs with their own data departments can be counted on the fingers of one hand. Most analysis is done by eye and by instinct. Instinct is precious, but instinct cannot be handed down.

The template includes a "PPDA" field — a metric for pressing intensity. I laughed when I read it. Not because it is meaningless, but because in Vietnam, pressing is usually measured by one line from the coach in the dressing room: "You have to run more than them." That line never enters a spreadsheet, but it is far more effective than many metrics.

---

Finance and transfers: numbers do not lie, but numbers do not tell everything either

The second section concerns club finance and the transfer market. Broadcast revenue, commercial revenue, wage bill, net debt. Sounds clear.

But in Vietnam, this section is almost impossible to fill. Not because clubs hide it, but because their financial structure differs sharply from the European model the template assumes. Most Vietnamese clubs depend on one or a few owners, or on a state enterprise as patron. Broadcast revenue is concentrated at league level and redistributed, rather than being the lifeblood of each club. Ticket sales do not cover wages. Shirt sales do not cover debt.

I once sat with a club's communications officer. He said something I never forgot: "In Vietnam, the season does not start with a whistle, it starts with whether the owner is willing to keep pouring money in." That line appears in no financial template. But it is the truth of an entire football nation.

This leads to a consequence that data cannot capture: prolonged uncertainty. A player does not know whether he will be paid next month. A coach does not know whether his seat is safe. A fan does not know whether his club will still exist. In that state, long-term tactics are a luxury. You cannot build a three-year football philosophy when you are not sure you will have money in three months.

A football nation that depends on the goodwill of the rich cannot be built by plan, only by hope.

On transfers, the template asks about total value, contract structure, panic-buy risk. I have never seen a Vietnamese club panic-buy in the European sense, because the budget does not allow panic. What they have is a different kind of calculation: sign young players cheaply, sell them abroad when the price is right, and live on the margin. That is the model of a football nation that sells talent to survive.

I do not judge that model. But I record it. Because it explains why Vietnamese football produces a bright young player every few years, then that player goes abroad, then the domestic league leans on the next one. An unbroken stream of talent that nonetheless does not settle. What does not settle does not accumulate. What does not accumulate does not grow.

---

Results and the opinion cycle: where emotion outruns data

The third section concerns results and the public-opinion cycle. Where the team stands against expectations, recent form, pressure on the coach, the players, the board.

In Vietnam, this section is always full — even overfull. The problem is not a lack of data, but that opinion runs far faster than data.

I watch how Vietnamese opinion reacts after each match. One win, and the whole country calls the team a golden generation. One loss, and the same people are called finished. This cycle is frighteningly short. I once saw a young player hailed after a goal, then demanded out of the national team after one misplaced pass, within less than two weeks.

The template calls this "the gap between market expectation and objective assessment". I call it "impatience". And impatience is the enemy of any long-term project.

What is worth noting is that this impatience does not come only from fans. It comes from the people inside football. A coach who loses three matches is sacked. A youth project is scrapped after one season. No one dares take responsibility for a process, because a process needs time, and time costs money, and money depends on short-term results. A closed loop.

In a football nation where results are measured by the week, no one dares invest in the things measured by the decade.

I am not saying opinion is bad. Public pressure is part of football, and it keeps teams from falling asleep. But when pressure exceeds the tolerance threshold, it does not push a team upward, it pushes it into a defensive shell. A coach defending against public opinion will choose the safe option. The safe option does not lose heavily, but it does not win big either. Vietnamese football, in many periods, has played not to lose heavily rather than to win.

---

League landscape and club positioning: the gap between tiers

The fourth section concerns the league picture. Title contenders, continental qualifiers, mid-table teams, relegation battlers.

In Vietnam, these tiers exist, but they are not stable. A champion this year can struggle against relegation next year, because the squad changes, because the owner withdraws money, because good players are sold. This volatility makes positioning a club nearly meaningless if based only on the current season.

I once tried to sort Vietnamese clubs onto a stable European-style ladder. I gave up. Not because I was lazy, but because that ladder does not exist in reality. What exists are economic power groups — state clubs, private clubs, real-estate clubs — and groups of players shifting between them every transfer window.

That does not mean the league lacks quality. It has quality. It has fine matches, beautiful moves, outstanding individuals. But it lacks structure. And without structure, fans cannot accumulate memory of rivalries, cannot build long-term competitive history. A Vietnamese derby can be good, but it does not carry the weight of a derby repeated over fifty years.

The "talent flow" field in the template asks about the risk of players being poached by bigger clubs. In Vietnam, the answer is: every club carries that risk, including the biggest. Because no club is big enough to keep a player who wants to leave and has a buyer.

---

Governance and rules: the grey zone no one records

The fifth section concerns rules and governance. Financial fair play, transfer registration, disciplinary sanctions, competition eligibility.

Here I have a view that has followed me for years. VAR does not reduce controversy. It only moves controversy from the pitch to the replay room, and pushes it into the grey zone of the law. I have seen this in many places around the world, and I will see it in Vietnam as VAR spreads.

The reason is simple. A collision in the box can be viewed from five angles and still produce no consensus. Because football's laws were not written for machines to judge, but for people to judge based on context. VAR gives the referee more data, but it also takes away his right to decide with a feel for the match. The result is that the referee no longer errs from a lack of information, but from too much information with no consistent standard for choosing.

For Vietnamese football, this matters more than for almost any other nation. Because in a football country where public opinion is already sensitive, every VAR decision becomes a battle of explanation. And that battle does not happen on the pitch; it happens online.

On organizational governance, there are two bodies anyone analysing Vietnamese football must mention: the football federation and the professional league operating company. The relationship between them, how power is divided, how broadcast rights are split — that is where the decisions affecting hundreds of players actually happen. But it is also the least written-about place, because it is dry, complex, and does not sell emotion.

---

Management and the dressing room: where I hide my notebook

The sixth section concerns the coaching staff and the dressing room. The coach's power model, the health of internal relations, generational transition.

This is the section I care about most, and the one I find hardest to write. Because the dressing room is where outsiders cannot enter. As a training-ground observer, I stand at the edge. I see players walk in, see them walk out, and infer from their expressions.

There are things that never show on the scoreboard, yet they decide everything.

I remember a season when I discovered unease in the dressing room between two foreign players at a club. I saw it through small details: how they avoided each other's eyes at meals, how they chose seats apart on the bus, how one did not extend a hand when the other fell in training. I wrote it all in my personal journal. I did not publish it. Because it was internal, and I did not have enough evidence to speak publicly. I have kept that notebook hidden until today.

In Vietnam, I observe a coach-player relationship quite different from Europe. A Vietnamese coach, beyond coaching, is an older brother, a father figure, sometimes an emotional manager. Vietnamese players are younger, and depend on the team more emotionally. So a coach's power lies not in tactics, but in the ability to keep trust.

I witnessed this while following Coach Park Hang-seo and the Vietnam U23 team in Jakarta. His use of a flexible back-three was a professional matter. But what made the team run without tiring was how he touched each person. A coach can change a formation, but cannot change trust. Trust has no metric.

The dressing room is where data dies. No spreadsheet can measure a shoulder pat at the right moment.

---

Risk profile: three risks no one writes about

The seventh section concerns risk. Sporting, financial, personnel, rules, public-opinion, systemic risk.

When I fill this in for Vietnamese football, I see three of the biggest risks that are not in the template.

The first is memory risk. A football nation that cannot archive its own history forces every generation to relearn from scratch. I once tried to find material on an important Vietnamese match from twenty years ago, and I could only find short articles, no full footage, no analysis. Without collective memory being preserved, people cannot know how far they have come. Not knowing how far you have come makes you either complacent or despairing.

The second is manpower risk. Vietnamese football lacks analysts, data people, and top-level sports-medicine staff. A talented player can shine, but a football nation cannot rely only on individuals shining.

The third is time risk. Professional football needs time to build. But if you are a player, your career is only fifteen years. If you are a coach, your contract is two years. No one in the system has an incentive to wait. The result is that things needing ten years are forced into ten months, and ten months is not enough.

---

Media and expectation: a voice that does not represent

The eighth section concerns media and the expectation cycle. Which tier the sources are on, the motive of the reporter, the durability of the story.

In Vietnam, football media is extraordinarily lively. Social media reports faster than the press. Transfer rumours fly everywhere, most without a source. One post from an anonymous account can shape public opinion for a week.

This makes the professional writer's job harder. Not because of a race for speed, but a race for attention. A correct analysis takes three days to write. A false rumour takes three seconds to post. In that race, the person doing it right always loses.

I have one principle: if I do not have enough data to be certain, I say "let me check again". I am grateful to the editors who gave me the right to do that. But I know many young colleagues in Vietnam do not have that right. They must write, must post, must generate engagement. And in that churn, caution becomes a weakness.

But I believe the opposite. In the long run, readers remember who was right, not who was fast.

---

Industry transmission: rhythm from academy to stands

The ninth section concerns transmission within the industry. From the youth-development chain, to the agent ecosystem, to broadcast rights, to derivative markets.

In Vietnam, this chain exists, but it is not yet closed. Academies produce players, clubs use them, the national team benefits, and the national team's success inspires children to play. That circle turns. But several links are loose.

The loosest link is the one from national team back to clubs. A national-team victory generates belief, but that belief does not automatically convert into spectators coming to the stadium every weekend. Ticket sales do not rise in proportion to emotion. And when the stands are not full, clubs have no money, and players are not paid enough.

I have seen the opposite in Korea. After a major tournament, K League clubs see attendance rise, and they have systems to keep that attendance. In Vietnam, emotion surges then subsides, leaving a familiar silence.

Not every match has spectators. But every match has someone keeping the rhythm.

That keeper of rhythm is not only the writer, but everyone who makes football run unseen: the groundskeeper, the ticket seller, the drummer in the stands, the person bringing a young player from a village to the city. They have no metrics. But without them, the match does not happen.

---

The counter-view: what the template does not ask

After walking through nine sections, I looked back at the template and realized something. The template asks a great deal about the club: tactics, finance, results, risk. But it does not ask about the fans.

In Vietnam, fans are not the audience of football. They are a part of football. They ride motorbikes hundreds of kilometres to see their team play. They stay up until two in the morning to watch the national team abroad. They cry when the team loses, and cry when it wins. They do not need Expected Goals to know a player is playing well. They watch with their eyes, feel with their hearts, and remember with their memory.

This is the core difference between Vietnamese football and football analysed by template. The template assumes the fan is a consumer. The Vietnamese fan is a companion. And a companion does not buy a ticket for data; they buy it for belief.

I once heard a view that xG has been misused. It cannot explain a match's decisions, a player's form, or a referee's standard. I partly agree. But I think the problem is deeper: these metrics were created to describe European football, where data goes back more than a century. Applying them to a young, data-poor football nation driven more by emotion than reason is using one person's ruler to measure another. The ruler is not wrong. The measurer is.

---

Why the gap is also a signal

There is one thing I want to make clear, and perhaps it is the most important point in this whole piece. A gap in the template is not necessarily a failure. It can be an opportunity.

A football nation where everything has been measured is one that has already taken shape. A football nation still full of empty boxes is one with room left to write. What is frightening is not the empty box, but people looking at it and walking away.

Vietnamese football is at a stage where every piece can still be rearranged. The league structure can still be fixed. The data system can still be built. The culture of record-keeping can still be nurtured. But that window does not last forever. Once a football nation has set into bad habits, fixing it is harder than building from scratch.

I write this from Busan, more than four hours' flight from Vietnam. I am not in the stands; I cannot smell the grass, I cannot hear the coach scream. I know that limit. But distance also gives me something people inside the game often lack: the calm to look.

---

What I have learned after twenty years

The 2026 season taught me that silence is also a way of cheering. That year, stadiums were empty of spectators. I sat before the screen, watching matches unfold in silence. For the first time I heard players calling to each other, the sound of the ball, the sound of the referee. I realized that for many years, the roar of the stands had drowned out the real sounds of the match. And when the stands were empty, I heard the true rhythm of football more clearly than ever.

I think that lesson applies to analysis too. We live in an age where noise outnumbers truth: rumours, metrics, arguments, drama. To hear the true rhythm of a football nation, we must turn off the noise. Must sit back down after the lights go out. Must write in the empty column.

Every player has his own rhythm. I only look for where it begins.

For Vietnamese football, that rhythm begins on a provincial training ground at six in the morning, when the mist has not yet lifted and a group of young players is running laps under the watch of a taciturn coach. No one films that session. No one records a metric. But if you want to know where a football nation will be in ten years, go there. Not to the final. To the training ground.

From Busan to the World Cup, I have learned that football does not lie. Everything fake is peeled away by time. Everything real leaves a trace. Awards, titles, rumours — all fade. Only the rhythm remains.

---

What I will write in my notebook next

I will not say what Vietnamese football needs to do. I am not in that position. I am the one who records, not the one who directs.

But I will say what I will do. I will keep sitting back down after every match. I will keep writing in the right-hand notebook, the "rhythm" column. I will keep calling the people who make Vietnamese football run — the groundskeeper, the ticket seller, the drummer — and ask them questions that are not in the template. And I will be patient. Because my job is not to predict the future, but to keep the present from being forgotten.

When the template reached me on a rainy night in Busan, I thought I would have nothing to write. It turned out I had a great deal. Because an empty box is not an ending. An empty box is a place to begin.

There is one line I always keep in mind whenever I open my notebook: Not every match has spectators, but every match has someone keeping the rhythm. And Vietnamese football, despite all the empty boxes in the template, does have people keeping its rhythm. They are not famous. They have no metrics. But they are there, every day, keeping the beat going.

I will end this piece with a question I will answer for myself next season, when I sit down with a new notebook: if all the numbers vanished tomorrow, would I still have enough to tell the story of Vietnamese football?

I think I would. Because that story is not in the numbers. It is in the way people sit back down together after the match ends.