Video assistant refereeing arrived in the Champions League promising fewer mistakes and more fairness. In many ways it has delivered: clear errors are corrected, and goals that should not have stood are disallowed. Yet VAR has also produced some of the competition's most furious arguments, because the decisions it reviews are often the ones where reasonable people disagree: handball, marginal offside, and whether a challenge is a foul or fair. VAR was introduced to the Champions League to correct clear and obvious errors, but its scope has expanded to include marginal offsides and handballs that divide even experienced referees.

Handball is the biggest source of controversy. The rules have changed repeatedly, and the distinction between a natural arm position and an offence that makes the body bigger is genuinely difficult to apply at full speed. A penalty awarded for a handball that looked accidental can decide a tie, and supporters of the penalised team feel cheated even when the decision follows the letter of the law. The handball law has been revised several times in recent years, and each revision has produced new controversies, because the distinction between deliberate and accidental handball remains difficult to apply consistently.

Marginal offside is the second flashpoint. Technology can now measure offside to centimetres, which means goals are disallowed for a toe or a shoulder being beyond the last defender. These decisions are technically correct, but they feel harsh, because no human eye could have spotted them and the advantage gained is negligible. The debate over whether offside should include a margin of tolerance continues every season. Offside technology now measures to the centimetre, which means goals are disallowed for margins invisible to the naked eye, and many supporters feel this goes against the spirit of the law.

VAR has changed how knockout ties are played. Defenders are more cautious in the penalty area, knowing that any handball or foul will be reviewed. Attackers are more willing to go down under contact, knowing that a review may award a penalty. Managers now factor VAR into their tactics, telling players to keep their arms down and to avoid grappling at set pieces. Communication with supporters in the stadium remains a weakness, because fans often watch a long delay with no explanation while television viewers see replays and hear analysis.

The review process itself has also changed the spectacle. Long delays while officials check monitors break the rhythm of a game, and supporters in the stadium often have no idea what is being reviewed. Broadcasters show replays; stadium crowds wait in confusion. UEFA has improved communication, but the experience of a VAR delay remains one of the competition's frustrations. Referees themselves have acknowledged that VAR has changed their decision-making, because they now know that a borderline call can be reviewed, which sometimes makes them less decisive in real time.

The honest answer is probably not. VAR can correct clear errors, but it cannot resolve genuinely subjective decisions, and it cannot make handball or offside feel fair to the losing side. The best that can be hoped for is consistency: the same decision in the same situation, whichever club is involved, and clear explanations when a decision is changed. Some leagues have experimented with announcing VAR decisions over the stadium public address system, which improves transparency but does not resolve disagreements about the underlying rules.

For supporters, the practical advice is to learn the current handball and offside interpretations before complaining, because many VAR controversies turn out to follow the rules as written, even when they feel wrong. The argument worth having is not about individual decisions but about the rules themselves: whether they should be changed so that football's biggest nights are decided by players, not by frame-by-frame analysis. The debate about VAR will continue, but most observers agree that abandoning it entirely would return football to an era of far more frequent and more consequential refereeing errors.