Vietnamese Football and the Data Void: When the Match Has No Metrics

I sat in stand B of Hoa Xuan Stadium on an April afternoon, in the very seat where, seven years earlier, I had ended up by mistake after losing my way. The man beside me, somewhere around forty, phone in hand, leaned over and asked: "Uncle, what is the home team's expected goals today?"

I could not answer. Not because I do not know what expected goals are — I had read about them in the early years of this century, when they were still a private game for a handful of analysts in England. I could not answer because at Hoa Xuan that afternoon, nobody was measuring that number. No camera tracking the ball's flight. No software logging the position of every touch. No assistant in the stands counting passes.

Vietnamese football has eyes, memory and instinct. That is the whole of our database.

Hoa Xuan Stadium was quiet enough that I could hear the ball sigh. And in that quiet, I understood something much larger than an U19 match: Vietnamese football operates on a data void, and that void is at once a fatal weakness and the loveliest thing we still possess.

To see how wide the void is, set it beside the standard the football world now runs on.

In a Premier League match, every shot is assigned an expected-goals value: the probability that the shot becomes a goal, calculated from position, angle, shot type and the pressure of the nearest defender. Every pass into a dangerous zone is flagged as "progressive". Every team press is reduced to PPDA — the passes an opponent is allowed before your side makes a defensive action; the lower the number, the fiercer the pressure. In England, Spain, Germany and Italy, hardly a top-flight club lacks its own data department, with analysts rewatching footage after every match.

In V.League 1, a competition that began in 2026, we have no such data department. Some clubs still manage contracts with a notebook and the memory of the officer in charge. Some matches are recorded completely in only two fields: the score and the name of the scorer.

This is not entirely laziness or ignorance. It is structural. The budgets of most V.League clubs are small enough that a monthly analytics-software subscription is a sum requiring deliberation. The Asian Football Confederation's club licensing system does require financial reporting, but inspection and sanction at domestic level remain loose, so opening the books is still alien to the habits of Vietnamese football. In Europe, the Premier League's Profit and Sustainability Rules can dock a club points for breaching permitted losses; in Vietnam, no equivalent mechanism forces a club to tell the truth about what it has spent.

When nobody is obliged to count, nobody counts.

The result is a football culture that runs on collective memory. Fans remember Quang Hai's free kick against Uzbekistan in Changzhou in 2026. They remember Cong Phuong dribbling past three defenders. They remember Van Hau charging up the left like a wave. They remember the night of 28 December 2026, when Vietnam won the AFF Cup for the first time over two legs against Thailand, and the night of 15 December 2026, when Vietnam won it a second time, also against Thailand, at My Dinh.

We remember moments. Memory of a moment is a kind of data, but it is data that cannot be extracted, cannot be sold, and cannot be used to value a player before he is sold away. It does not tell a coach whether to substitute in the 60th minute or the 70th. It does not tell a technical director whom to sell in December.

Try something that sounds simple: describe the playing style of a V.League club without using words like "feeling", "flair" or "spirit".

I have tried, many times, on television. I always drift into vague phrases: "controlling the tempo", "building with purpose", "a focused back line". What do those words tell a viewer? Very little. They are the echo of a football culture that has never been measured, and therefore has never been forced to define precisely what it is.

A V.League coach who wants to know whether his press is working must rewatch footage, rewind and rewind, and count for himself. No metric lets him compare this match with that one. He has only instinct. The instinct of a man who has lived with football for thirty years deserves respect, but it cannot be handed to a player, cannot be stored for next season, and cannot be upgraded over time.

The shortage of tactical data impoverishes commentary, and it also impoverishes the coaching process itself. A football culture that cannot measure itself cannot systematically correct itself. It can only correct itself through the intuition of individuals, and intuition dies with whoever holds it. When a good coach leaves, most of his knowledge leaves with him, because it was never written down as numbers for the next man to read.

The introduction of video assistant referee technology in V.League from the 2026 season was a correct step, and it shows we can absorb technology when we have the will. But VAR adjudicates a single incident; it does not build a data system for clubs. The two are very far apart.

World football values players with data: minutes played, expected goals, expected goals against, chances created, age, developmental trajectory season by season. Vietnamese football values players with the eye.

I do not disparage the eye. It was the eye that gave me the first rough gem of my life. In the summer of 2026, at Hoa Xuan, I happened to sit in the wrong stand, stand B, for the U19 match between SHB Da Nang and Hanoi. The first half was so dull I considered leaving. Then in the 73rd minute, a number 10 named Dang Van Toi took the ball with the outside of his right boot, and it drew a curve like the letter S before striking the post. I did not know who he was. After the match I combed the squad list, watched the replay twelve times in slow motion, and wrote "The Boy Who Drew an S on the Grass". The head coach of the national U19 side read it and called the boy up.

That boy did not need tactics; he needed someone who could read the hunger of his ambition.

But that beautiful story is also a sad one. A football culture whose talent discovery depends on whether an old journalist sits in the wrong stand is a football culture that stakes its fate on luck. In Germany or Japan, a seventeen-year-old playing provincial youth football already has a data file detailed enough for three big clubs to know him before he reaches the first team. In Vietnam, he exists only if somebody happens to look.

When Vietnamese players step into the international market, that very void pushes their value down. A European club looking into a Vietnamese player opens Transfermarkt, the crowd-and-editor-sourced valuation database, and sees a modest figure assembled from very little information. They have no detailed scouting report, no injury-prevention index, no physical data. So they pay little, or they do not pay.

Based on my experience of watching matches from U19 qualifiers to national-team fixtures over more than fifty years, I believe the biggest gap between Vietnamese football and advanced Asian football is not physicality or individual technique. It is the ability to see one's own value.

There is a form of loss Vietnamese football has endured quietly for years: players leaving on free transfers when their contracts expire.

In organised football cultures, the final contract year is a managed situation. Either extend, or sell before losing the player for nothing, because the club knows what his remaining value is, month by month. In Vietnam, the final contract year usually passes in silence, and only when the player signs elsewhere does anyone startle awake.

The fault is not the player's. The fault lies with a system that has no tool for seeing time. Nobody tracks a player's value trajectory month by month, so nobody knows which moment is the moment to sell. A club loses an asset it may not even have known it held on the balance sheet.

In Europe, a club's board meets each transfer window with a spreadsheet: which players have one year left, what their estimated value is, and in which window they must be sold if no extension is agreed. In Vietnam, that meeting usually happens later, or not at all.

Modern football contains a distinction Vietnamese media routinely blurs: between the manager, who oversees coaching as well as transfer strategy and club building, and the head coach, responsible only for training and matchday.

The distinction matters because it determines how we read every decision a club makes. When a V.League side buys a player the coach did not want, the problem is structural. When a coach buys his own players and fails, the problem is competence. In Vietnam, we tend to reduce everything to the fault of the man in the dugout, without knowing whether he holds real authority.

Without data on that division of authority, every judgement we make about a coach is built on sand. And sand gives way when the season turns.

Vietnam's football academies — Hoang Anh Gia Lai, PVF, Viettel, Hanoi — have achieved notable things over two decades. They produced the generation that took Vietnam to the 2026 AFC U23 Championship final in Changzhou, and to the AFF Cup title that same year.

But what those academies still lack is the ability to measure development. A fifteen-year-old has improved over six months in which specific ways? Nobody can answer with numbers. Assessment rests on the coach's eye, and a human eye cannot remember a thousand children.

This produces a large consequence: we may coach well, but we do not know where we coach well, and therefore cannot deliberately repeat success. When a generation succeeds, we praise a "golden generation" as a gift from heaven, rather than analysing why that generation succeeded so it can be done again.

A V.League player features in thirty matches a season, plus national-team fixtures. Nobody records the distance he covers in each match. Nobody records how many times he reaches top speed. Nobody monitors weekly training load to know when he is about to break down.

In advanced football cultures, load data is among the most important injury-prevention tools. It tells a coaching staff when to rest a player, when to reduce volume. In Vietnam, most injuries are discovered after they happen, and explained with a familiar word: "bad luck".

I have watched promising young players lose entire seasons to injuries that could have been prevented. None of them was protected by a measurement.

Precisely because data is missing, Vietnamese football journalism runs almost entirely on emotion. A win means a team is "in form"; a defeat means the coach has "run out of ideas". Nobody can prove what "form" is, how long it lasts, or over how many matches it is sampled.

Data does not kill emotion. Data makes emotion more honest. Knowing that a side has won three in a row while the quality of chances it creates has not risen lets a writer tell a far more interesting story than shouting alone can. Readers may feel happier, or sadder, but happy and sad in the right places.

The Vietnam national team has produced feats no football culture can deny: AFF Cup titles in 2026, 2026 and 2026, a place in the 2026 AFC U23 Championship final, and a first-ever appearance in the third round of Asian World Cup qualifying in the 2026 cycle. These are the achievements of a football culture poor in data but rich in hunger.

But when we analyse those achievements, we tend to get stuck at the level of inspiration. "Vietnamese spirit", "willpower", "character" — beautiful words, but not transferable. When that generation grows up and moves on, we have nothing left but memory.

A football culture that cannot measure its own success cannot reproduce it.

At this point I want to say something a young analyst may not enjoy hearing.

The data emptiness of Vietnamese football is not purely a disease. It is also a form of protection.

Modern football has used data to optimise human beings into assets. Every player becomes a bundle of metrics, and when the metrics fall, he is sold. That is why I was once criticised for "poetic commentary" on television. To be called a poet on air is something I am proud of — the ball was poetry to begin with.

In Vietnam, because there are no metrics, a player who develops slowly can still be kept. Because nobody can measure precisely how much worse he has become, he is given one more season. Sometimes that patience produces a captain, a 90th-minute scorer, a player everyone thought was finished who comes back to life. In a football culture with full data, that second chance might have been sold away long ago.

A rough gem needs no polishing, only a gaze patient enough to love it. I wrote that about boys, but it is equally true of a whole football culture.

Yet I must state the other half, because otherwise I am romanticising weakness.

That patience is paid for by the very people it protects. Vietnamese players are kept because nobody can value them, which means they never learn what they are truly worth. They have no basis for negotiating wages, no data to prove they have improved, no file a foreign club will trust. That beautiful patience, seen from the player's side, is sometimes just a room with no window.

And when a Vietnamese player goes abroad with nothing in hand but a highlight video, he enters a market where people read the file before they read the heart. He loses before he plays.

The task is not to import expected goals from England and paste it onto V.League, like sticking a foreign wine label on a bottle of fish sauce. The task is to build a way of measuring that is our own — one that knows how to count the things that matter here: the minutes a young player gets in the professional league, the years an academy holds a generation together, the number of times a club sells a player before losing him for nothing, the number of matches a key player rests before he breaks.

My forebears said: to go far, you must know where you stand.

At sixty-seven, I still believe in magic, because I have seen a gem find itself in the mud. But I believe one thing more: magic must be written down, otherwise it is only one person's memory, and one person's memory dies with him.

The stands are empty, but history still needs an audience to retell its most beautiful sorrow.