Video assistant referees are at the Euros for the first-ever time, and ESPN is reviewing every full VAR review.
"UEFA believes very much in this project," said Roberto Rosetti, the chairman of UEFA's referees committee. "The aim is to not only to help referees, but to help football. We are very satisfied with the results, and we are working hard to improve the system."
There are 22 video match officials on duty at Euro 2020, all of them based centrally in a hub at UEFA's headquarters in Nyon, Switzerland. All 51 games will have a lead VAR, an assistant VAR and an offside VAR to make sure the game flows as well as possible.
Since UEFA started using VAR in February 2019, it has featured in 453 matches through to the 2021 Champions League final, with 139 decisions changed -- one in every 3.25 matches.
Each time VAR leads to a change of decision or pitchside monitor review, it will be detailed on this page as the tournament progresses.
GAME: Wales 1-1 Switzerland, June 12
DECISION: Mario Gavranovic (Switzerland) goal disallowed for offside, 85th minute.
WHAT HAPPENED: Breel Embolo helped the ball on to Gavranovic inside the six-yard box, and he finished well past goalkeeper Danny Ward. The Swiss celebrated what they thought was a late winner, only for the VAR to rule it out for offside.
VAR RATING: 9/10 - Definitely the correct decision. Gavranovic was just ahead of the last defender when Embolo played the ball and VAR came to Wales' rescue. However, UEFA's lack of transparency in broadcasting the final VAR offside image loses it a point.