Vietnamese Football and the Data Void

On a Saturday evening, I sat in front of a screen in Beijing and replayed a V.League match through a stream delayed by two seconds. I needed three numbers to begin my work: the count of high presses in the opponent's final third during the first half, the number of shots originating from inside the penalty area, and the distance covered by the midfield line. Ninety minutes later, I had exactly one number — the scoreline. The statistics table I needed does not exist. It was not locked behind a paywall, and I had not searched carelessly. It had simply never been generated.

Fans see the performance; I see the Tuesday morning training session. But in the V.League, both the fans and I are looking at the same void — we only name it differently. That is why I believe the biggest problem in Vietnamese club football is not technical quality. It is information.

To understand why, you have to look at how clubs operate. Most clubs in V.League 1 survive on money from a parent company or a wealthy patron. This model deserves no moral judgment — it has sustained the game for decades. But it produces one repeated consequence: nobody is obliged to disclose anything.

How is broadcast revenue distributed? Unclear. What share of the budget goes to wages? Unclear. How is a contract structured, how long is it, does it contain a release clause? Almost nobody answers. In Europe, these figures exist because the law forces them to exist, because investigative journalism demands them, and because not a few clubs are listed on stock exchanges. In Vietnam, they appear only when the owner feels comfortable and sees an advantage. That is the context, and context determines everything that follows.

Layer one: the pitch

A league that wants to be analysed seriously needs three layers of data: event data (who passed to whom, and where), positional data (where players stood and how they moved), and physical data (distance, speed, load). The V.League has the first layer only in raw form, and even that layer lacks systematic coverage.

I once tried to rebuild an expected-goals figure for a single round by manually tagging the location of every shot. Alone, over two days, for one round. That method cannot scale. No data provider covers the whole V.League, because not enough people pay for it. And not enough people pay for it, because not enough people feel its absence.

This is the loop that locks every analysis. Without pressing data, you cannot separate a team that runs a lot from a team that presses in the right places. Without positional data, you cannot separate a disciplined deep block from a fearful deep block — two things that look identical on screen but carry opposite tactical meanings. An empty stand still makes noise — it is the noise of bad data, and in Vietnam, most of the time we do not even have anything to get wrong.

The professional consequences are concrete. A coach analyses opponents by eye, by memory, by a few clips he cut himself. That is not wrong, and often it works. But it does not scale, it cannot be handed down, and it cannot be verified. When a decision fails, there is no way to know whether it failed at the data stage or the judgment stage.

Layer two: the wallet

Finance is the same. When a player moves from club A to club B in the V.League, the fee is usually undisclosed, or disclosed as a goodwill-rounded number. No valuation site covers the league well enough to serve as a benchmark. As a result, nobody — not even an expert — can say whether a deal was expensive or cheap on any evidential basis.

A successful contract is written in January, not June. But to know whether it was written well, you must see its structure: length, wages, bonuses, extension options, sell-on clauses. In the V.League, those sit in a closed boardroom with no minutes taken. When a big club signs a star, the right question is not "how much stronger are they" but "what are they paying for". That question is unanswerable if the number does not exist.

The consequences reach beyond individual deals. They distort the whole landscape. A club that spends quietly can look like a club that spends cautiously, even while it burns money inside. Conversely, a thrifty club can be branded stingy because nobody sees its long-term investments. History is a reference document, not a verdict — but to reference anything, you first need data to reference.

This is the transfer window, and noise always drowns out signal. Every day brings rumours of this star moving to that club, most with no second source, no timeline, no confirmation. Fans read them as truth taking shape; I read them as unverified claims. The only thing I can do is rank them by evidence: who said it, when, and what that person gains if it is true.

Another kind of data is missing in the same way: audience data. Tickets sold, online viewership, engagement — the things leagues elsewhere use to price sponsorship — in Vietnam tend to be published only when the number looks good. That makes even the commercial value of the league hard to assess from outside.

Layer three: development and the exit path

Here I must say what many in the industry do not want to hear: the weak data culture of Vietnamese football is not only a media problem. It seeps into development.

Over the past decade, Vietnam has built a few genuinely serious academies — places that invested in facilities, curricula and youth coaches, not just a name on a gate. That deserves credit. Alongside them, a not-small share of "academy" projects bearing a former star's name operate as commercial channels: charging fees, building image, and rarely producing professional players at a rate matching their fame. The telling part is that it is hard to prove this with numbers — again, a data problem.

What is more severely missing is a layer of grassroots coaches who are properly trained, systematic and given a clear pathway. A league can produce a golden generation through luck and a few exceptional individuals — the Quang Hai, Cong Phuong generation is the frequently cited example. But it cannot repeat that sustainably without a system, and a system must be measured. Do not ask who plays well; ask who trains on time — and sadly, in Vietnam, even the question of who trains on time usually has no data to answer it.

The exit path is a rare bright spot. More and more Vietnamese players are moving to the J.League, the K.League and beyond. But again, information about these deals comes more from foreign partners than from Vietnam. Owning clubs rarely disclose the deal structure, the sell-on percentage, or the training compensation. We know a player left, but usually not at what price.

Layer four: governance and the boardroom

At the governance level, the void grows larger still. Who is the head coach, who is the technical director, who actually decides transfers — these boundaries are so blurred at many V.League clubs that insiders themselves sometimes get them wrong. I call it the unrecorded power model.

No minutes, no published org chart, no one accountable to the public. This makes evaluating a decision nearly impossible: we do not know who said what in the meeting, who overruled whom. Any analysis of "the board's vision" or "strategic error" becomes speculation dressed as analysis. Media sells dreams; I sell the dressing-room record. But in Vietnam, that record usually has just one page: the player's name and the club.

The misunderstanding from outside

When I lay this out for foreign colleagues, the familiar reaction is: "Well, the V.League naturally lacks data — it is a small league." I consider that lazy and, in one respect, wrong.

The problem is not scale. There are leagues smaller than the V.League in revenue that have open data, relatively public wage bills, and a culture of record-keeping. Vietnam's problem is an information culture, not market size. A football nation with tens of millions of fans and a decade of steady growth is more than large enough to sustain a data ecosystem. What is missing is organised demand, and an environment where decision-makers feel safer when nothing is written down.

The second misunderstanding is more dangerous: assuming that "no data" means "no analysis". I do not believe so. When numbers are absent, a serious analyst must switch to something else — observing structure, tracking personnel, noting small shifts in how things operate. But it must be named correctly: that is qualitative inference, not a conclusion drawn from data. Numbers do not know how to lie, but the people who choose them do — and when there are no numbers, people easily choose a beautiful story for themselves.

What would change

I did not write this to complain. I wrote it to ask the right question. If the league organisers, the federation and the clubs treated the publication of basic data — minutes played, distance covered, shot locations, contract structure at a minimum — as part of the product they sell to audiences, then everything downstream would change: how we analyse, how we recruit, how we develop, and even the commercial value of the league.

The open question is simple, and it needs no data to answer: among those running Vietnamese football, who actually wants others to see their numbers?