The visitors took the lead through Charlie Adam's penalty after Granit Xhaka elbowed Joe Allen.

Theo Walcott turned in substitute Hector Bellerin's cross just before half-time for his 100th club goal.

Mesut Ozil headed over goalkeeper Lee Grant to give Arsenal the lead before substitute Alex Iwobi side-footed home the third.

The Gunners leapfrog Chelsea on goals scored, with Antonio Conte's side facing West Brom at Stamford Bridge on Sunday at 12:00 GMT.