When the Dossier Is Empty: A Lesson in Honesty from an Analysis with No Data

On a Saturday evening in Liverpool I opened a file on my computer. Inside was a transfer dossier for a young Vietnamese player. Twelve fields. Not one of them carried a number. Age: being verified. Minutes at senior level: not compiled. Goals: handwritten note, no timestamps, no opponents. xG: blank. Touches inside the box: blank. The team's PPDA when he started: blank. Source: blank.

The person who sent it added one line: "Have a look, is he worth it?"

I sat still for a while. Thirty-five years around the transfer market, I have turned down a fair amount: a few invitations to go on air, a few phone calls at midnight, a few contracts I already knew were going to fail. I had never had to turn down a question simply because the paper was too white.

The file was not corrupted. It was valid. It had a title, a date, an author, an internal reference number. It simply had no content. In my trade, an empty dossier is more dangerous than a wrong one. A wrong dossier can be corrected, argued over, hauled in front of a review. An empty dossier always attracts somebody to fill it, with guesswork, with rumour, with a forty-second clip on the internet.

In England, when a club is about to spend twenty million pounds, it buys data before it buys a player. The recruitment department submits three layers: physical, technical, and a combined demographic and psychological profile. Each layer has its own source, its own update date, and a person who signs their name to it. If a layer is empty, the deal does not get signed. That rule came out of disasters that taught an entire industry that belief is no substitute for data.

In Vietnam, most deals still run in the opposite order. People believe first, then go looking for data to defend the belief. A young player who performs in three televised matches acquires a price. A young player who performs across twenty matches in a lower division that nobody films acquires nothing. That is how the mechanism runs. It is the consequence of a market without measurement infrastructure, rather than of a generation of football people being bad at their jobs.

From my own experience of watching matches, I would put the number of V.League 1 clubs operating a genuine analytics department, meaning staff, software, and above all the power to veto a deal, at fewer than five. The rest work by eye, by relationship, and by memory. Memory is a superb tool for retelling a match. It is a poor tool for pricing a human being.

That leaves a vacuum. And a vacuum always finds somebody to fill it.

There is one example I still keep on my machine. At the ASEAN Championship 2026, Vietnam beat Thailand 5-3 on aggregate: 2-1 in Việt Trì on 2 January 2026, 3-2 in Bangkok on 5 January 2026. Nguyễn Xuân Son scored in both legs, and the serious injury he suffered in the second leg is an image I would rather not watch again.

Before the tournament I asked three people inside Vietnamese football which squad was strongest. I got three different answers, and all three opened with the word "feeling". None of them was wrong. They were talking about something that had never been measured.

After the tournament I went back through the match data. What I found was not in the pretty passages. It was in the number of times Vietnam recovered the ball within eight seconds of losing it in the opponent's half. That figure was far above anything in the group stage. It never made the evening bulletins. It never made the online summaries. But it explains why the team won, whereas the praise explains only why the audience was happy.

Data whispers, and those who know how to listen will hear the miracle. I first wrote that line in 2026, after a season at Anfield. With each passing season I find it a little more true, and in need of being said a little more quietly.

Now back to the empty dossier.

A V.League 1 club operates on a transfer budget that is modest regionally, but not modest compared with its own ten years ago. When money arrives faster than the ability to measure, prices get set by whoever talks loudest in the room. Usually that is the agent, because the agent is the only person present on every call.

A young player with fewer than fifty senior appearances can be valued at a figure that a decade ago an entire squad would not have dreamed of. In England they call it a price bubble. I call it a naked gamble, a bet on something nobody has verified, in a room with no spreadsheet.

And here is the part I want to put plainly. The problem is not the number itself. The problem is that the number has no source.

In a properly built dossier, every data point must answer three questions: where it came from, when it was taken, and who is accountable for it. An 89th-minute goal against an already-relegated side carries completely different information value from an 89th-minute goal in a final. If the dossier does not record the opponent, the matchday, or the score at the moment of the goal, it is concealing more than it reveals.

Every number in a transfer ledger is a life waiting to be written. But a life written in somebody else's pencil does not belong to the player.

People tend to think of data as an instrument of proof. For me it is first an instrument of refusal. It exists to tell you that what you believe may be wrong.

In 2026 I built an xG model for the World Cup in Russia and wrote that Croatia were reaching the final on luck. Croatia did reach the final. I locked myself in a library for two weeks going back through the data, and found that my model omitted corner kicks. A small technical error. The consequence was a wrong conclusion delivered in a very confident voice.

That taught me what these empty Vietnamese dossiers are teaching all over again: the most dangerous thing in analysis is not missing data, but data inserted into the gap that nobody has flagged. In England they call it silent failure. The spreadsheet stays open. The columns stay full. Nobody knows that half of it is the inference of a person who had coffee at eleven at night.

Correlation and causation are two different things. A young player scoring ten goals in half a season is not necessarily twice as good as one who scored five. He may play for a stronger side, take more penalties, or simply have had a lucky twelve weeks. I learned at Anfield that belief is also a variable. And a variable that is never measured does not belong in the equation, however real it feels.

Those who are right before their time always pay for it in loneliness. But in Vietnam, those who are wrong before their time also pay in loneliness, just later, once the contract is signed, once the player has spent two seasons on the bench, and once nobody remembers who recommended him.

I decided to answer the sender with a different question. Not "is he worth it", but: "Your dossier is missing twelve fields. Which one do you want to fill first?"

In a world of ever-longer seasons, the awakened can only rely on their own spreadsheet. But an honest spreadsheet begins with the cells left empty, and with a note explaining why they are still empty.

Knowing how to leave a cell empty may be the hardest skill Vietnamese football has not yet finished learning. When a dossier can go to the board with white space still in it, and nobody in the room feels ashamed of that, the domestic transfer market will finally start to carry real prices.