The Champions League returned this week with VAR involved almost immediately.
Aston Villa conceded a penalty after a handball review in Bruges. Ethan Mbappé was sent off after an incident away from the ball. Goals for AEK Athens and Feyenoord disappeared after video checks, while Roma saw an apparent penalty changed to a free-kick in Istanbul.
None of those decisions produced the kind of refereeing crisis that sometimes dominates a European week.
That does not make them uninteresting.
In fact, the opening round offered something more useful: several examples of VAR doing completely different jobs within the same competition.
There was subjective judgement, violent conduct missed in real time, factual offside and even a decision that came down to whether a foul happened a few centimetres inside or outside the penalty area.
And this season, UEFA is doing something important alongside those interventions.
It is explaining some of them.
Club Brugge 2–3 Aston Villa: the handball UEFA says was a penalty
Aston Villa were leading 3–1 in Bruges when Nicolò Tresoldi headed towards goal shortly before the hour mark.
The ball struck Aaron Wan-Bissaka's left hand.
No penalty was initially awarded, but VAR intervened and referee Sandro Schärer reviewed the incident.
The decision changed.
Tresoldi converted the resulting penalty to make it 3–2, bringing Club Brugge back into a match Villa had appeared to control.
UEFA subsequently published its technical explanation of the intervention.
Its reasoning was concise: Wan-Bissaka touched the ball with his left hand while the arm was in an unnatural position and away from his body.
That is significant because handball remains one of VAR's most disputed areas.
The fact that the ball hits an arm does not automatically make an incident punishable. Position, movement and whether the player has made the body unnaturally bigger remain central to the judgement.
Here UEFA concluded that the threshold had been crossed.
Villa survived the late pressure and won 3–2, but the incident was the first major example this season of UEFA using its new public explanation system to tell supporters not simply what VAR decided, but why.
Lille 2–3 Real Betis: VAR catches Ethan Mbappé's off-ball elbow
The most obvious intervention of the week came in Lille.
Ethan Mbappé had already helped create Lille's opening goal against Real Betis. By the 53rd minute, the match had completely changed and Betis were leading 3–2.
Three minutes later, Lille's situation became considerably worse.
With the ball elsewhere, Mbappé struck Betis defender Natan in the head with his elbow.
VAR picked up the incident.
After reviewing it, referee Georgi Kabakov showed Mbappé a red card for violent conduct.
UEFA's technical explanation states that the Lille player deliberately struck an opponent in the head with his right elbow while not challenging for the ball.
This is one of the clearest arguments for VAR.
The incident happened away from the immediate play. Missing it in real time is understandable. Allowing a player to remain on the pitch after an unseen act of violent conduct would be much harder to defend once television pictures had captured it.
Mbappé later apologised for the incident.
Betis held on for a 3–2 victory.
Not every VAR intervention needs to create a 50-50 debate. Sometimes the value of the system is precisely that it catches something the referee could not reasonably have seen.
For an explanation of where this type of intervention sits within the protocol, see VarVote's guide to what VAR can actually review.
AEK Athens 1–0 LASK: the goal that disappeared
AEK Athens thought they had doubled their advantage against LASK midway through the second half.
Luka Jović found the net.
VAR checked the attacking phase and the goal was disallowed.
UEFA says AEK's No.14 had been in an offside position and played the ball during the build-up.
The score remained 1–0 and that was how the match finished.
This was a different kind of intervention from the Mbappé dismissal or Wan-Bissaka handball.
There was no judgement about whether contact was sufficient for a foul or whether an arm position was natural. VAR was dealing with the attacking sequence and an offside offence before the goal.
It is also a reminder that the moment supporters remember is not always the moment VAR is reviewing.
A goal can look perfectly legitimate at the point the ball enters the net, only to be removed because of something that happened earlier in the possession.
VarVote has already seen how divisive that can become. In August, Kaj Sierhuis had a late Champions League qualifying goal ruled out because of an earlier offside in the attacking phase.
The principle was the same in Athens.
Barcelona 5–1 Feyenoord: another goal, another earlier offside
Feyenoord experienced something similar at Barcelona on Wednesday.
Nacho Ferri appeared to have pulled a goal back shortly after Raphinha made it 3–0.
The celebration did not survive the review.
UEFA's explanation says Feyenoord's No.8 had been in an offside position and then played the ball in the build-up.
The goal was disallowed.
Barcelona eventually won 5–1, so this did not become a result-defining controversy. But that should not change how the decision itself is assessed.
One of the dangers when discussing VAR is judging an intervention by the final score.
Had Feyenoord's goal made it 3–2 rather than 3–0, the same offside would suddenly have received far more attention.
The law and the VAR process cannot depend on how dramatic the scoreboard makes the decision feel.
Fenerbahçe 1–1 Roma: penalty or free-kick?
Thursday brought perhaps the best example of VAR dealing with a factual boundary.
Roma were level at 1–1 away to Fenerbahçe when Paulo Dybala went down under a challenge from Kerem Aktürkoğlu in the 68th minute.
Referee Jesús Gil Manzano pointed to the penalty spot.
VAR checked the location of the foul.
The contact had occurred just outside the penalty area.
The penalty was therefore cancelled and Roma were awarded a free-kick instead.
That distinction matters.
VAR was not overturning the referee's judgement that a foul had occurred. It was correcting where the offence happened.
The penalty area line is part of the penalty area. A foul on the line would therefore still produce a penalty. In this case, the contact was judged to have occurred before Dybala reached it.
Roma did not score from the free-kick and the match finished 1–1.
It was probably the least subjective intervention of the week, yet potentially one of the most consequential.
A few centimetres changed a penalty into a free-kick.
UEFA is finally showing its work
The individual decisions matter, but the most encouraging development from this Champions League week may be happening away from the pitch.
UEFA has created a dedicated page for technical explanations of selected VAR decisions during the 2026/27 competition.
The explanations are prepared by refereeing experts on duty and, for significant incidents, can be accompanied by images or video.
That matters.
For years, one of VAR's biggest weaknesses has been the information gap between the officials making a decision and everyone watching it.
Supporters see a referee stop the match.
They see a hand against an earpiece.
Sometimes they see a monitor review.
Then they see the final signal.
What they rarely receive at that moment is the reasoning.
UEFA's new approach does not make every decision correct. It does not remove subjectivity and it certainly will not end arguments about handball, serious foul play or the intervention threshold.
But it gives those arguments a better starting point.
Instead of guessing why the video referee intervened, supporters can increasingly compare the decision with UEFA's own explanation.
That is a meaningful improvement.
The harder test will come when UEFA disagrees with the crowd
There is an obvious caveat.
The four explanations UEFA had published from the opening two nights all concern decisions where VAR intervened and the original decision changed.
The bigger transparency test will be controversial non-interventions.
Those are often the incidents supporters find hardest to understand.
Why did VAR send one referee to the monitor for contact in the penalty area but stay silent when apparently similar contact happened in another match?
Why was one arm position considered unnatural while another was accepted?
Why did one challenge reach the clear-and-obvious threshold and another fall just below it?
Those are the moments where an official explanation has the greatest value.
VarVote's own coverage increasingly reflects that distinction. A VAR review that produces an obvious correction is not automatically a controversy. A non-intervention can be far more interesting when credible evidence suggests the system should have stepped in.
The technology is only one part of the argument.
The intervention threshold is the other.
A good opening week for VAR?
On the evidence available, it is difficult to describe the Champions League's opening week as a VAR failure.
A missed off-ball elbow was caught.
A handball was reviewed and explained.
Two goals involving earlier offsides were removed.
A penalty was correctly relocated outside the area after the position of the foul was checked.
There will be much harder nights.
The real test will come when UEFA's refereeing experts face a decision that splits former referees, players and supporters, or when a major non-intervention changes a knockout tie.
For now, though, the most interesting change is not that VAR made several corrections.
VAR has been doing that for years.
It is that UEFA has started telling everyone why.
That is the kind of transparency video refereeing has needed for a long time.
And it gives supporters more information with which to answer the broader question for themselves: should VAR remain part of top-level football?