Manchester United roared back from a half-time deficit to record a controversial 2-1 victory over Arsenal at Old Trafford.
Andrey Arshavin capped a brilliant first half by putting Arsenal ahead and if Ben Foster had not denied Robin van Persie with a brilliant feet-first save, Arsenal would probably have won.
Instead, Wayne Rooney won a debatable penalty when he went down under Manuel Almunia's challenge, and scored it himself before Abou Diaby turned Ryan Giggs' free-kick into his own net to give the hosts their victory.
Van Persie thought he had equalised deep into stoppage time but his effort was ruled out for an offside against William Gallas, and Arsene Wenger's protest against the disallowed goal led to him being sent from the dug-out.
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