Chelsea boss Antonio Conte heaped praise on Eden Hazard after the win 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 Hazard before Cesc Fabregas put the game beyond his former club when he lobbed past Petr Cech after a poor clearance.
Eden Hazard's strike put Chelsea out of sight against Arsenal
Olivier Giroud scored a late consolation for Arsenal but Conte was full of praise for Hazard.
"Hazard shows always quality," Conte said.
"I am pleased for him.
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"Today his performance was very good with the ball.
"But I want to underline without the ball because he worked a lot for the team.
"When he plays this way he is a complete player."