Manchester United came from behind to defeat Arsenal 2-1 at Old Trafford after the visitors had made all the running. Arsenal looked on course for a fifth successive victory after they dominated the first period and took a deserved lead just before the break through Andrey Arshavin.
But two home goals in the space of five second half minutes turned the game in The Reds favour.
Gunners keeper Manuel Almunia needlessly fouled Wayne Rooney after 59 minutes to allow the England striker to equalise from the penalty spot.
And the turnaround was complete when Abou Diaby headed a Ryan Giggs free kick into his own goal.
And Arsenal's frustrating night was complete when boss Arsene Wenger was sent off by referee Mike Dean for kicking out at a plastic bottle.
The reason for the Frenchman's ire was seeing Robin van Persie's injury-time leveller ruled out for offside.