The Premiership leaders went in front when Wayne Rooney headed in a cross from Patrice Evra.
Robin van Persie slide in a goal, and leveled the score, eight minutes from the end.
Arsenal skipper Thierry Henry headed in the winner in injury time.
The Premiership leaders went in front when Wayne Rooney headed in a cross from Patrice Evra.
Robin van Persie slide in a goal, and leveled the score, eight minutes from the end.
Arsenal skipper Thierry Henry headed in the winner in injury time.
