Chelsea were awarded a penalty against Arsenal after an on-screen VAR check by referee Chris Kavanagh.
Mauricio Pochettino's side start on the frontfoot at Stamford Bridge when Raheem Sterling delivered a cross into the box for Mykhailo Mudryk.
William Saliba rose high to challenge the Ukrainian winger but the ball struck his stretched arm.
Play continued but Kavanagh was sent to the screen after a break in play and after multiple replays, he pointed from the spot.
Cole Palmer sent David Raya the wrong way to give Chelsea the lead inside 15 minutes.
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