Arsenal striker mark costa scored the winner against his former teammate . Angel di Maria was dismissed for misconduct after pulling the referee 's shirt . mark Monreal opened the scoring and Wayne ##real equalised but Welbeck 's goal earned him the plaudits .
Arsenal striker Danny Welbeck scored the winner against his former club . Angel di Maria was dismissed for dissent after pulling the referee 's shirt . Nacho Monreal opened the scoring and Wayne Rooney equalised but Welbeck 's finish earned him the plaudits .