It was a decision that swayed the game. VAR proved a huge talking point in last night's Carabao Cup semi-final between Chelsea and Tottenham as a Harry Kane penalty gave Mauricio Pochettino's side a big win at Wembley.
Kane's goal in the 26th minute, however, was controversial to say the least. Chelsea goalkeeper Kepa tripped the England striker in the box after a chipped ball from Toby Alderweireld.
Officials initially awarded an indirect free-kick to Chelsea after calling Kane offside, but the decision was reversed after referee Michael Oliver referred the decision.
This decision caused quite the controversy. Chelsea players surrounded the referee, who later gave a penalty after resorting to VAR. Kane slotted away the spot-kick and Pochettino's side went on to win the game 1-0.
That wasn't the end of this controversy for manager Maurizio Sarri. The Italian brought out Chelsea's analysis footage of the game on a laptop to prove the Tottenham striker was indeed offside.
He argued that the assistant stopped when flagging, unnerving his defenders who thought Kane was in an offside position.
"Our camera was in line with Harry Kane and he was offside with the head and the knee," Sarri said.
"I saw only our video from our camera. Maybe the VAR camera was in a different position. But from our position, he was clearly offside. It was also really important that the linesman stopped running with play - he had a big impact on our defenders.
"I don't think English referees are able to use the VAR system. If you are not sure with the system, you have to follow the ball and at the end of the action decide. But he stopped and didn't follow the ball - for our defenders it was clearly offside. I don't know about the goalkeeper but sure, the defenders."
Sarri continued his argument, saying that VAR was a 'disaster' when they first used it in Italy.
"In Italy, there is VAR and in the first season, it was a disaster. The referees did not know how to use the system. I think at the moment the referees [here] are not ready to use the system in the right way.
"It's also strange for everybody that in the Premier League, there isn't VAR, and in the Carabao, there is."
Thoughts on the decision? Do you think Sarri has a right to be frustrated with VAR?
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