XR Is Quietly Changing Football, One VAR Decision at a Time

When most people hear the term Extended Reality (XR), they think of headsets, virtual worlds and immersive games. Few realise that one of the most practical uses of XR is now appearing in front of millions of football fans during the FIFA World Cup, every time a marginal offside decision is reviewed by VAR.

Before the match even begins, each player’s body is digitally mapped so that the system understands far more than just where the player is standing. It knows body proportions, limb positions and key skeletal points such as shoulders, knees, feet, hips and head. During the game, multiple cameras around the stadium track these points continuously, while sensors and AI help identify the exact instant the ball is played.

The players are only one part of the equation. The official match ball itself contains an inertial measurement sensor that continuously records its movement hundreds of times every second. This allows the system to identify the precise instant the ball leaves the player’s foot during a pass. That moment is critical because an offside offence is judged at the exact instant the ball is played, not when it reaches the receiving player. By combining the ball’s sensor data with the three-dimensional positions of every player on the field, the system can determine an offside position with remarkable precision, something that would be almost impossible using video footage alone.

This information is then used to build a three-dimensional recreation of the incident. The viewer may only see a clean animation with offside lines and player outlines, but behind that simple graphic is a sophisticated digital model of the players, the ball and the pitch at a precise moment in time.

This is where XR becomes important. VAR is no longer merely replaying video footage. It is using spatial computing to reconstruct reality, allowing referees to examine an incident from an artificial viewpoint that no physical camera may have captured directly.

The Iran incident against Egypt was one such example. Iran believed it had scored a decisive goal, only for VAR to disallow it for offside. The controversy arose because the goalkeeper had moved out, which meant the offside line was determined by the second-last Egyptian player rather than the last defender most viewers were watching. The 3D reconstruction made the decision clearer, even if it did not make it any less painful for Iran.

That is the strange power of XR-assisted VAR. It can remove ambiguity, but it can also remove some of football’s old romance.

For decades, football was enjoyed not only on the field but also after the match, in living rooms, offices, cafes and WhatsApp groups, where people argued endlessly over whether a goal should have stood. Now, technology is reducing many of those arguments to a matter of geometry.

So perhaps the real question is this: is XR-assisted VAR improving football by making it fairer, or is it quietly ruining the old pleasure of watching, arguing and disagreeing long after the final whistle?