Chelsea boss Antonio Conte was delighted with his side's victory over Arsenal
Marcos Alonso opened the scoring from close range when he headed in the rebound after Diego Costa's effort hit the crossbar.
The Blues doubled their lead through a fantastic strike from Eden Hazard before Cesc Fabregas put the game beyond his former club when he lobbed past Petr Cech after a poor clearance.
Chelsea are now 12 points clear at the top of the table
Olivier Giroud scored a late consolation for Arsenal and Conte was disappointed with late goal.
"I'm a little disappointed for the goal we conceded to Arsenal," Conte said.
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Express Sport brings you Chelsea's player ratings from their win over Arsenal
"I repeat is important to try always to improve and keep the concentration in the right way from the start until the end.
"In the second part of the game we conceded a bit of chances to Arsenal.
"Also we created a lot of chances to score the other goals but it's a pity that we conceded one goal today."