VAR, the "Clear and Obvious Error" and the Gray Zone of Data in Modern Football

On the night of July 15, 2026, at the Luzhniki Stadium, referee Néstor Pitana left the touchline, walked to the edge of the penalty area and pointed to the spot after reviewing a monitor at the side of the pitch. He judged that Ivan Perišić had handled the ball inside the box; France were awarded a penalty in the World Cup final, and Antoine Griezmann scored the opening goal in the 38th minute. It was the first time VAR intervened directly in a World Cup final. For me, that moment carried more than joy: technology does not erase controversy, it only moves controversy to another layer, where spectators see nothing but a screen and a referee weighing his options.

VAR was trialled by FIFA from 2026 in several national leagues before its global debut at the 2026 World Cup in Russia. Its core principle sounds rigorous: it intervenes only for a "clear and obvious error", or to catch a serious missed incident. Four categories of incidents can be reviewed: goals, penalties, direct red cards and mistaken identity. In theory, this is a tidy rulebook. In practice, the whole system hangs on a phrase no one has fully defined: "clear and obvious".

In the V.League, VAR arrived later than in Europe's top divisions. When it was introduced, Vietnamese fans split in two. Half breathed a sigh of relief, because wrongful decisions finally had a mechanism for correction. The other half quickly realised VAR does not make the game flow faster, does not make controversy disappear, and sometimes breeds a new kind of frustration: frustration at having to wait, at not understanding why the referee is drawing a rectangle in the air, at a whole stadium holding its breath while one person a few hundred metres away reviews a single frame.

This is where I want to linger. The space for subjective judgement inside VAR is larger than people assume, and "clear and obvious error" is itself an ambiguous clause. Based on my experience of watching matches, that gray zone sits in three layers.

It begins with frame speed. When a collision is replayed in slow motion, every contact looks heavier than it was. A shoulder nudge lasting an instant at real speed can become an act of violence when slowed tenfold. Referees do not watch football in slow motion, but VAR hands them exactly that to decide with. This is a technical paradox rarely stated plainly: the tool meant to increase accuracy can distort the perception of severity.

Then there is the choice of frame. Cameras do not pick their own angles. An operator decides which frame, which angle, and which starting second to hand the referee. A passage of play cut at the right instant can tell two entirely different stories. In other words, before the referee rules, a layer of editing has already taken place that spectators never see. Video data, like every other kind of data, is never perfectly neutral; it is neutral only within the limits its collector allows.

The intervention threshold is subtler still. For the same incident, two referees can reach two conclusions, and both can justify being right: one sees "clear enough to overturn", the other sees "not clear enough to reverse". This is not the fault of any individual referee. It is the inevitable consequence of turning a qualitative judgement into a quantitative threshold without anyone being able to measure exactly where that threshold lies.

The semi-automated offside technology unveiled at the 2026 World Cup removed part of the subjectivity: the offside line is now drawn by machine, accurate to the centimetre. But it only answers the question of where a player was standing. The harder question, whether that player was interfering with play, still rests with humans. The machine answers the easy part; people still carry the hard part.

I look at VAR through the very lens I once used to dissect esports. In League of Legends, a patch changes a champion's stats, and an entire tactical system must be rewritten. But what ultimately decides victory is how people read the situation under pressure. In 2026, I stayed up all night writing 4,200 words about Levi's 14 ganks at MSI, calling each situation a poem of attack. The lesson I drew was not that data wins, but that data only means something when it is read correctly. A gank from the left flank: the 4,200-word lesson I wrote in 2026 still holds for modern football.

In 2026, when the pandemic turned stadiums into empty concrete blocks, I proposed simulating the Premier League's remaining 92 matches with data. Liverpool won, with 79% per-match accuracy. But there was one proposal I dismissed outright: adding players' psychological injuries, because I believed it could not be measured in metrics. I was wrong. Empty stadiums were the biggest patch in Premier League history, and we missed the lesson, the lesson that what cannot be measured can still decide outcomes.

This is where I want to push back on my own belief. People often romanticise data as a neutral light illuminating the essence of things. But sports data today flows through pipelines most spectators do not control: live indices sold to betting companies, prediction models packaged as products, and a single wrong metric spreading faster than a correction. The biggest risk of digitised sport is not a lack of data, but data that looks complete while being hollow. A pipeline that returns an empty result is less dangerous, because everyone can see it is empty. The danger is a pipeline that returns a beautiful, plausible, and wrong metric.

I learned this the expensive way. In 2026, when a 19-year-old Mbappé ran at 34 km/h and scored twice in four minutes against Argentina, I wrote that he was like a champion in a game who only needs to activate at the right moment, no flashy combo required. The piece spread fast. Then a colleague reminded me: "You looked at him as a metric, not as a human being crying." That stopped me cold. Since then, every metric in my writing must come with a heart.

So when I talk about VAR, I do not want to fall into either easy extreme. One side is blind faith that technology will deliver absolute justice. The other is nostalgia for a pure era of football without screens, an era that was in fact full of wrongful decisions no one could fix. Football has no patch, but it has moments that rebalance an entire era. VAR is one such moment. The question is not whether to use it, but whether we are honest enough to admit what it solves and what it conceals.

Looking ahead, I believe the next generation of VAR will not win by adding more cameras, but by making the decision process itself transparent: publishing the audio exchanged between referee and VAR team, showing spectators which frame was chosen, and openly admitting that a gray zone which cannot be digitised will remain. A mature football culture is not one without controversy, but one brave enough to say clearly: here the machine decides, there the human decides, and we are accountable for both.