Europe's big five leagues are about to deliver one of those Saturdays when VAR has nowhere to hide.
There are 25 league matches across the Premier League, LaLiga, Bundesliga, Serie A and Ligue 1 today. The Premier League alone has seven, with five kicking off at 16:00 in Norway before Tottenham host Everton at 18:30 and Sunderland face Arsenal at 21:00.
The interesting part is not simply the volume. The five leagues are entering this weekend with noticeably different ideas about when video refereeing should step in.
England is publishing more evidence about its decisions. Germany has expanded VAR into one new area. Italy is deliberately asking VAR to interfere less. Spain has already given Real Madrid another evening shaped by offside and a late penalty. France has produced early examples of goals being taken away after review.
So where is today's flashpoint most likely to come from?
Premier League: the missed intervention matters as much as the correct one
The Premier League has seven matches today:
Aston Villa v Nottingham Forest, Bournemouth v Brentford, Chelsea v Hull, Crystal Palace v Ipswich and Liverpool v Fulham all kick off at 16:00 Norwegian time. Tottenham v Everton follows at 18:30, with Sunderland v Arsenal at 21:00.
The league's new weekly Key Match Incidents panel has already given us useful context. Through the first two rounds, the panel assessed 56 key incidents and judged 84 per cent of the original on-field decisions correct. After VAR intervention, that figure rose to 96 per cent.
That sounds like a strong case for VAR.
Then comes the uncomfortable detail.
In Match Round 2, the panel also identified a penalty that should have been awarded and said VAR should have intervened. The challenge was judged reckless, the non-penalty was considered a clear and obvious error, and the player involved should also have received a second yellow.
That is exactly the kind of incident VarVote will be watching for today. The biggest story may not be an overturn. It may be the moment when the screen stays silent.
VarVote prediction
Most likely Premier League VAR debate: a penalty-area non-intervention.
With seven matches and several teams likely to spend long periods defending their own box, there should be no shortage of holding, late challenges and handball appeals.
Liverpool v Fulham and Sunderland v Arsenal stand out as the two matches where one disputed penalty call could quickly become the main talking point.
LaLiga: Real Madrid are already living on the VAR margins
LaLiga gives us four matches today: Racing Santander v Alavés, Osasuna v Espanyol, Athletic Club v Elche and, at 21:00, Real Madrid v Rayo Vallecano.
The late game is the obvious VAR watch.
Real Madrid's last league defeat at Real Betis included two major late decisions. Carlos Espí thought he had equalised with a bicycle kick, only for the goal to be ruled out for offside after VAR review. Deep into stoppage time, Madrid were then awarded a penalty after Vinícius Júnior was fouled, but Kylian Mbappé's spot kick was saved.
That makes tonight's Madrid game unusually easy to frame. Their early season has already shown how quickly a match can move from celebration to geometry.
VarVote prediction
Most likely LaLiga VAR debate: offside in the build-up to a goal.
Rayo will expect to defend deep for stretches of the game, while Madrid will attack the space around and behind the last line. That is exactly the type of match in which one tight run can decide whether a goal survives.
A penalty review would surprise nobody either.
Bundesliga: one new VAR power could suddenly matter
Germany has six matches today. Dortmund host Paderborn, Hoffenheim face Stuttgart, Freiburg meet Borussia Mönchengladbach, Augsburg play Leverkusen and Mainz host Frankfurt at 15:30. Köln v Werder Bremen follows at 18:30.
The Bundesliga enters the season with a significant VAR change.
Video officials can now intervene when a second yellow card that produces a red is clearly wrong. That is a narrow expansion, but an important one. A dismissal that used to be beyond VAR's reach can now be corrected.
Germany has not adopted every optional expansion. Corner decisions, for example, are still outside the review process.
That creates a useful dividing line. A wrongly awarded corner can still lead to a decisive goal without VAR being able to revisit the restart itself. A clearly incorrect second-yellow dismissal can now be corrected.
VarVote prediction
Most interesting Bundesliga scenario: a second-yellow red that reaches the new VAR threshold.
It may not happen today. But when it does happen, the argument will be immediate: has VAR fixed an obvious injustice, or has another part of the referee's authority moved upstairs?
For a broader look at the rule, see VarVote's vote on VAR and second-yellow red cards.
Serie A: watch the decisions VAR does not change
Serie A may be the most interesting league of the day from a VAR perspective.
Genoa v Frosinone starts at 15:00, Lazio v Milan at 18:00 and Atalanta v Cagliari at 20:45.
Italy has spent the opening weeks moving in the opposite direction from the idea that more video means better refereeing.
Daniele Orsato's new approach has pushed responsibility back towards the referee on the pitch. VAR calls have dropped sharply, contact is being judged more generously, and coaches have praised the improved flow of matches. Gazzetta has also noted the other side of that policy: more than one mistake has gone uncorrected.
That tension is why Lazio v Milan is arguably today's best VAR game.
This fixture has recent history. In their March meeting, one Milan goal was disallowed for an immediate handball, while another penalty appeal was checked without intervention because the contact was not considered a clear and obvious error.
The question tonight may again be less about whether VAR sees an incident and more about whether it thinks the incident is wrong enough to justify changing the referee's call.
VarVote prediction
Most likely Serie A controversy: a subjective penalty appeal that VAR checks but leaves alone.
That would fit the league's early-season direction perfectly.
VarVote looked at the change after the opening two rounds in Serie A's new VAR threshold.
Ligue 1: Strasbourg already know how quickly a goal can disappear
Ligue 1 has five matches today: Strasbourg v Monaco at 17:15, then Auxerre v Nice, Le Havre v Angers, Lorient v Toulouse and Paris FC v Lyon at 20:45.
Strasbourg v Monaco is the match that catches the eye first.
Strasbourg have already been on the wrong side of a significant VAR change this season. Against Lens, Jacobo Ortega's 56th-minute goal was initially awarded before a review led to it being disallowed.
That incident is already in the VarVote archive.
Monaco arrive with three wins from three, including a 2-1 victory away to Paris Saint-Germain last weekend. A close match with attacking quality on both sides is exactly the setting in which one goal review can become decisive.
VarVote prediction
Most likely Ligue 1 VAR debate: a goal review involving offside or an attacking foul in the build-up.
Strasbourg have already experienced one. Today would be a very visible time for another.
Five leagues, five different VAR stories
What makes this Saturday interesting is that VAR is not operating in one uniform European culture.
The Premier League is publishing more of the evidence behind decisions and openly admitting when the video team should have stepped in.
Germany has given VAR a new power over clearly incorrect second-yellow dismissals.
Serie A is testing whether football improves when VAR shows greater restraint.
LaLiga continues to produce high-profile offside and penalty decisions around its biggest clubs.
Ligue 1 has already supplied examples of goals being reversed after review.
Twenty-five matches gives us a large sample in a single day.
Our prediction is that the most important VarVote poll tonight will not necessarily come from the most spectacular overturn. It may come from a decision that VAR looks at and chooses not to change.
That is increasingly where the real argument lives.
Follow the latest VAR decisions on VarVote throughout the day. For the rules behind what VAR can and cannot review, read VarVote's guide to VAR.