After Cole Palmer's penalty 15 minutes into the game, Mudryk's goal doubled the Blues' lead against the Gunners. Mauricio Pochettino's team entered the match on a three-game winning run, having beaten Brighton in the Carabao Cup and then Fulham and Burnley in the league before the international period.
Mudryk, meanwhile, has now scored twice for Chelsea in 26 appearances since joining, having opened his account in the 2-0 win at Fulham.