English referees still have a lot of catching up to do as far as the usage of the video assistant referee (VAR) is concerned.

This is the submission of Chelsea Coach, Maurizio Sarri, after Tuesday's League Cup semi final clash against Tottenham  

Unsurprisingly, Sarri was not happy with the technology after the game and said English referees struggle to use the system properly.

 "A few minutes ago I watched the video from our camera. It was offside. Our camera was in line with Harry Kane. Offside with his head, the knee. Offside. It was really important the linesman carried on running, he had a big impact on our defenders.

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 "I don't think English referees are able to use the 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 offside. It's very strange in the Premier League there isn't VAR and in Carabao Cup there is the system."

Spurs edged the first leg clash 1-0 thanks to Harry Kane's 26th-minute penalty.

There was no doubt the Englishman was fouled in the box by Blues goalkeeper Kepa Arrizabalaga.

However, referee Michael Oliver, consulted VAR to check Kane was onside when he was put beyond the defence by Toby Alderweireld's long ball—the assistant initially flagged offside. 

The official system adjudged he was onside so the penalty was awarded and Kane converted.

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