Jose Mourinho and Chelsea continue to torment Arsene Wenger's Arsenal side, beating them 2-0 on Saturday.

Arsenal was left with just 10 men after 45 minutes when Diego Costa managed to get Gabriel sent off and then just nine men for the final 11 minutes when Santi Cazorla picked up a second yellow card.

Kurt Zouma scored Chelsea's first goal off a free kick when he converted a header at the back post.

Eden Hazard sealed the win in stoppage time with a deflected shot off Calum Chambers.

Mourinho said Costa was man of the match.

"I don't have a view on the sending off. Man of the match for sure was Diego Costa. He brought everything to the game."

He added: "The game is about all different aspects. The technical, emotional, physical and with a combination of these factors normally the best team wins. We were the best team. We were dominant, we were in control.

"I played my first derby as manager in September 2000 and I remember my words to my players. To win the derby -- emotional control. I always repeat the same words before derbies.

"For me it was a fantastic performance [from Costa]. He played the game like the game has to be played. He's fast, he's aggressive and he's good to recover the ball and offers us different qualities."