Manchester United were stunned by Arsenal at Old Trafford, with Danny Welbeck scoring against his old side. Watch video highlights.
Arsenal went ahead after 25 minutes when Nacho Monreal fired in from close range. The Spaniard’s cool finish followed fine work from Mesut Ozil and brilliant dribbling skills from Alex Oxlade-Chamberlain.
Manchester United hit back almost instantly when Wayne Rooney powerfully headed home Angel Di Maria’s cross.
Danny Welbeck pounced on a shocking error from Antonio Valencia to round David De Gea and slot the ball into the empty net.
Angel Di Maria pulled referee Michael Oliver’s shirt after receiving a yellow card for simulation, leaving the official with little choice but to send him off.