The Blank Columns in Vietnamese Football's Data Skeleton

The only line on my notepad that night read: “xG column — empty.”

I had reopened the footage of a V.League match and set up a spreadsheet with every header in place: possession, shots, passes, PPDA, expected goals. Ninety minutes later, the first four columns had filled. The last one stayed blank — not because the match produced no chances, but because nobody had recorded those chances as data.

In the summer of 2026 I saw the Opta ghost – and since then, my eyes have stopped believing what they see. But only in this transfer window, sitting in Barcelona over a stack of old notebooks, did I understand something else: the ghost does not knock on every door. There are football nations it has never visited.

The biggest problem in Vietnamese football, at the analytical level, is not people and not tactics. It is the layer of verifiable data — and that layer is returning blank.

People still talk about Vietnamese football through belief, through memory, through the evenings spent watching together. I do not dismiss any of that. But a football nation that holds only memory cannot correct itself, because it has no way of knowing where it went wrong.

How the blank is produced

Picture a two-step assembly line. Step one breaks raw material — a match, a contract, a medical bulletin — into discrete information points: what minute, who, where, and with what outcome. Step two fits those points into a professional frame: tactics, finance, risk, media.

The frightening part is not step two. The frightening part is that when step one returns nothing, step two still runs. The frame still produces all nine dimensions, all its tables, all its headings, and every content cell says the same sentence: insufficient information.

I have received a document like that. It was long. It had a table of contents. It was formatted so neatly that a skimming reader would take it for a serious report. Inside, from the first line to the last, not a single event had been established. A perfect skeleton. No flesh at all.

That assembly line runs everywhere; only the yield of step one differs. In Europe's top leagues, step one runs on tracking cameras, event-data providers and disclosed fees. In the V.League, step one runs on broadcast stat graphics, a few outsourced services, and the memory of people sitting in the stands.

Based on my own experience watching matches across many seasons, I can put it briefly: a V.League game generates enough movement to analyse, but not enough record to verify. The four numbers on screen — possession, shots, shots on target, corners — are a summary, not a dataset. From a summary you can tell a story. You cannot reconstruct a fact.

Three other data layers sit in the same condition, and they matter far more than what happens across ninety minutes.

Layer one: prices that are never published

The transfer window is the high season of noise. In a market where fees, contract lengths and wage structures are largely undisclosed, every rumour carries equal weight. There is nothing to refute, and nothing to confirm.

In a market where prices are not published, noise is not a by-product — it is the product.

I once believed in instinct. After Opta, I believed in probability. After COVID, I believed in structure. And the structure of a deal sits in the details least often mentioned: contract length, extension clauses, the agent's share, the registration date.

The two Vietnamese players who went abroad — Nguyễn Công Phượng and Nguyễn Quang Hải — are usually cited as symbols. Try rebuilding their contract structures from public information alone. You will have a headline, a few signing photographs, and very few facts anyone can verify independently. I doubt nothing about their ability. I am only saying this: if even the most heavily covered transfers leave such a blur, the rest of the market is a dark zone.

The transfer market is a monastery where numbers chant; I merely transcribe what they pray. In Vietnam, that monastery mostly chants in silence.

Layer two: injuries without diagnoses

Medical confidentiality blinds fans and media, and clubs announce an injury only when announcing it suits them.

In the V.League, a medical bulletin usually arrives as one short sentence: a strain, overload, a knee problem. No grade, no recovery window, no assessment standard. For a club, that is a rational choice — publishing the details of a key player's injury is equivalent to writing down the asset. For an analyst, it is total darkness.

Clubs do not lie about injuries. They simply stay silent in the most advantageous way.

The consequence does not stop at predicting line-ups. It spreads into the market: a player whose injury history was never properly recorded will be mispriced — and nobody knows in which direction, because nobody has the data to compare. When medical information is sealed, you are not valuing a player. You are valuing a promise.

Layer three: governance decisions without a format

Vietnamese football does not lack announcements. Governing bodies still issue documents, still hand down disciplinary rulings, still publish registration lists. The problem is format and continuity: one decision lives inside a scanned image, another inside a social-media post, a third only in a passing remark at a press conference.

When governance data is not standardised, the cost of verification explodes. Journalists spend their time hunting the document instead of analysing it. Fans receive whichever version an algorithm hands them. And precedent — the single most important instrument in compliance analysis — evaporates within months, forcing every season to restart from zero.

A football nation does not lack decisions; it lacks the format that turns a decision into data.

The same blank, in two other places

Vietnamese women's football is the clearest illustration of how a sport can be sponsored without being measured. Women's competitions appear in sponsors' social-responsibility reports, in marketing campaigns, in sustainability indices. But ask for a match-data series long enough to judge how a women's player improved across three seasons, and the series does not exist.

Commercialisation of the women's game therefore stops at the symbolic layer. A sponsor buys an image, not a system. And a system without data cannot be resold to anyone.

Esports sits in the same dark zone, differing only in speed. A competitor's playing career is shorter than a footballer's, yet the academy pipeline and post-retirement support are close to zero. Esports taught me one thing: human reaction speed never beats the speed of an algorithm. It taught me the opposite too — an algorithm is only useful when somebody is accountable for recording its output.

The empty skeleton is the most dangerous product

Put the four layers together and a pattern appears. Vietnamese football has all the rituals of a modern football nation: pre-match press conferences, transfer bulletins, injury lists, tactical seminars. But most of those rituals run on memory, not on record.

When memory is the only raw material, what gets produced is not analysis — it is guesswork wearing professional clothing.

An analysis that is formally complete but substantively empty is the most dangerous product a data-poor football nation can manufacture, because it generates false confidence.

I have seen that process in its purest form. A nine-dimension document, each dimension with a table, each table with rows, each row reading insufficient information. It looks far more like deep analysis than a short comment online. Its information value is nil. If somebody reads it and then makes a decision, the error will be born from a document containing no typographical mistakes at all.

That is why I no longer trust analysis judged by feel. The scoreline can be beautiful, but without a record, that beauty teaches nobody anything for next season.

Buying more equipment solves nothing

The first reflex when discussing data gaps is to buy more hardware: more cameras, more software, more tracking licences. That is a misdiagnosis.

V.League clubs already wear GPS vests in training. They hold medical files on every player. They keep wage books. That data exists — it simply never leaves the technical department's office. Vietnam's problem is disclosure and audit, not collection.

The correlation between data density and football quality is also far weaker than people assume. Leagues with dense data layers still sign bad contracts. Football nations with thin data still produce good players. Data does not play, run or shoot. It does one thing: it shortens the feedback loop. It makes error visible sooner — and makes people answerable for that error sooner.

Put another way, the true value of a data layer is not that it helps a team win more. It is that it strips decision-makers of the right to say I did not know, after having said I was certain.

There is a paradox more troubling than missing data: the presence of empty skeletons makes missing data harder to detect. A handsome document shields a blind decision. And in a football nation where a coach's job is decided by three rounds of results, a handsome document is the easiest thing in the world to sell.

I am 68 years old, but data is younger than I have ever seen it – every season it grows another layer of teeth. In Europe those teeth come through so fast the writer has to run to keep up. In Vietnam, I am still waiting for the first tooth to emerge in the right place.

What I will be tracking over the next twelve months

Three kinds of record will decide whether Vietnamese football builds an evidence layer.

The first is the club licensing file — which organisations publish fully, periodically, in the same format across consecutive years. The second is the injury bulletin: does it carry a grade, a timeline, an assessment standard, or is it still a two-word sentence. The third is the registration list at the close of the transfer window — the one record every deal must pass through, however well the price is hidden.

If all three stay dim, Vietnamese football will keep producing perfect, empty documents, and fans will keep being fed stories nobody can verify. If even one of them begins to glow, a great deal of what has been written from memory will have to be rewritten.

When the stadiums fell silent in 2026, I understood: football never died, it merely took off its coat and revealed its skeleton. Vietnamese football's skeleton lies somewhere between packed stands and blank spreadsheet cells. Whoever finds it first will write the history of the next twenty years — or at least, will be the first to write it correctly.