VAR and the Lesson of an Empty Pipeline: When the Analysis Tool Fails Before the Match Even Starts

That night, I sat in front of the screen in my Saigon office, waiting for a data file a colleague in Australia had sent over. The file arrived. I opened it. And it was empty. No title, no source, not a single line of information. Just blank fields marked with three familiar letters: N/A. The first whistle was blown by the camera, and I heard it as if the whole world were holding its breath — but this time, the whole world was holding its breath because there was nothing to blow the whistle for.

In football, there is a situation referees rarely talk about: when the VAR system loses connection, when the transmission line from the central control room to the pitchside monitor is cut, the main referee must still continue officiating the match. He cannot stop the match and tell both teams that "we are waiting for the system to be fixed." No one allows that. The match goes on, and the referee must decide based on what his own eyes see, on experience, on professional instinct.

But there is a fundamental difference between that situation and the one I faced that night. When VAR loses connection, the referee still has a match. He has players, a ball, a crowd, ninety minutes to manage. But when the data file is empty, I have no match at all. No players, no teams, no tournament, no timeframe. Only a complete analytical framework with eight sections, each designed to answer a specific question — and not a single piece of data to answer it.

I have seen something similar in my VAR analysis work. There are matches where I receive footage from a single camera angle, low quality, noisy, insufficient to determine whether the ball touched a hand. Both coaching staffs call, demanding a conclusion. Journalists call, asking what I think. Fans comment under the article, questioning why I am silent.

The pressure to provide an answer is enormous. And here is what I have learned after years: the greatest pressure is not the pressure to be right, but the pressure to say something — anything. Because silence, in the sports media environment, is considered failure. No one praises an analyst for daring to say "I don't know."

But I learned that lesson in the most painful way. On the night of the Euro 2026 semi-final, when Sterling went down in the box in the 104th minute, I had enough camera angles. I reviewed the footage multiple times. And I concluded: there was not enough evidence to award a penalty. But then hundreds of objections flooded in, and I changed my position. I did what a referee must never do: I changed my judgment because of pressure from the stands.

The truth is, in analytical work, there is one immutable principle: when data is insufficient, the only correct answer is to admit that data is insufficient. Not to offer a hedged judgment. Not "it could be a penalty." Not "in my opinion..." But to say plainly: I cannot conclude.

That is exactly what the eight-section analytical framework in that night's data file did. Every section — from technical-tactical analysis, to player physical condition, to organizational context, to business model, to rules and governance, to health risks, to media narrative, to industry transmission chain — was filled with a single sentence: "insufficient information."

It sounds like a failure. But in reality, it is a rare act of honesty in the sports analysis industry.

Think about this. In the current transfer window, hundreds of rumors emerge every day about this player moving to that club, with this transfer fee, with that salary. Sports news sites publish detailed analyses of how that player will fit the new club's tactics, how many goals he will score, how he will contribute. And most of those analyses are built on a single foundation: unconfirmed rumor.

That is why I increasingly believe that the greatest value of an analyst is not the ability to reach conclusions, but the ability to recognize when not to reach conclusions. A good referee is not the one who blows the whistle most, but the one who knows when the whistle is not needed. A good analyst is not the one with the most opinions, but the one who knows when his opinion has no value.

In football, we have witnessed the consequences of concluding when data is insufficient. At the 2026 World Cup, when VAR was first used, there were penalties awarded based on camera angles that were not clear enough. At the 2026 World Cup, when goal-line technology was applied, there were goals disallowed by a few millimeters. In both cases, the problem was not that the technology was wrong, but that the technology was used to reach conclusions in situations where it was not reliable enough to conclude.

That is a lesson I think Vietnamese sports analysis needs to learn. We have too many analyses built on fragile foundations: a video clip cut from TV, a screenshot, a rumor from an anonymous Twitter account. And we deliver definitive conclusions, professional judgments, assessments presented as if they were obvious truths.

But the truth is, in most cases, we do not have enough data. We do not have the best camera angle. We do not have information about the player's physical condition. We do not know what is happening in the dressing room. We do not know what the referee saw from his position. We only have a small part of the picture, and we are trying to paint the whole picture from that small part.

I see what no one else sees, and I have to live with it. But I have also learned that sometimes the most important thing I can do is admit that I see nothing at all. That I do not have enough data to conclude. That the most honest answer is "I don't know."

Five thousand members, one old screen, and trust split into five thousand pieces. That is what I built with the Saigon VAR community. And I realized that trust can only be maintained if I am honest about what I know and what I do not know. Not by providing definitive answers to every question, but by admitting my limitations.

The referee blows the whistle, but the fans are the final judges. And fans, even if they may not know all the technical details, have an astonishing ability to recognize fabrication. They can forgive an honest mistake. But they will never forgive a fabrication presented as truth.

In this transfer window, when hundreds of rumors are released every day, I think we need more analysts willing to say "I don't know." We need more people willing to question the source of information, the reliability of data, what we truly know and what we are merely guessing.

Because, in the end, what makes an analyst valuable is not the number of conclusions he reaches, but the quality of those conclusions. And quality, in any field, begins with honesty about what we know and what we do not know.

That night, when I closed the empty data file and turned off the computer, I did not feel like a failure. I felt that I had done exactly what a professional analyst should do: admit that there was not enough information to analyze. And sometimes, that is the most valuable conclusion we can offer.