Here are the top five statistics from Sunday's encounter:
2) Diego Costa's scored his ninth goal of the season with just his first shot of the match. He has now scored in six of his seven Premier League matches for Chelsea.
3) This clash saw Arsenal fail to record a shot on target in a Premier League game for the first time since September 2003 (versus Manchester United).
4) Chelsea's Cesc Fabregas now has seven Premier League assists this season - as many as any Chelsea player produced in the top flight last season. Four of Costa's league goals this term have been assisted by the Spaniard.
5) Belgian youngster Eden Hazard has now scored all seven of his Premier League penalties. Of the players with 100% records, only Dimitar Berbatov (9/9) has more.