Arsenal went to the top of the Premier League table after a 3-1 victory at home to Stoke City.
Victory left the Gunners two points in front of both Chelsea and Liverpool. But north London rivals Tottenham Hotspur will join them on 12 points if they win away to Cardiff City later on Sunday.
Wales midfielder Aaron Ramsey, who suffered a potentially career-threatening leg injury following a poor tackle by Stoke's Ryan Shawcross three years ago, made it seven goals in eight games when he gave Arsenal a fifth-minute lead at the Emirates Stadium, with a close-range strike after Potters goalkeeper Asmir Begovic had palmed away a Mesut Ozil free-kick.
Stoke, however, were back on level terms when USA international Geoff Cameron scored his first goal for the club in the 26th minute with a controlled shot from the edge of the box after Marko Arnautovic's volley had come back off the post.
Arsenal though were 2-1 up before half-time through centre-back Per Mertesacker's looping header.
Bacary Sagna then scored his first goal in 19 months as Arsenal again made Stoke pay for failing to defend a set-piece when he headed home in the 72nd minute from another free-kick by £42.4m club record signing Ozil, the Germany international producing a sparkling display on his Gunners' home debut.
Swans taste success
In Sunday's other early kick-off match, Swansea City won 2-0 away to Crystal Palace, with Michu putting the Welsh club in front in just the second minute before Nathan Dyer added a second goal shortly after half-time.