Louis van Gaal hit out at Angel di Maria after the Argentinian was sent off for grabbing referee Michael Oliver 's shirt in Manchester United 's FA Cup quarter-final defeat by Arsenal . The Gunners set up a semi-final meeting against either Reading or Bradford thanks to a 2-1 win over 10-man United at Old Trafford . Former United striker Danny Welbeck returned to haunt Van Gaal by scoring the winner after Wayne Rooney had equalised Nacho Monreal 's opener . Premier League referee Michael Oliver shows Angel di Maria a red card during FA Cup clash at Old Trafford . Di Maria was shown a second yellow card after pushing Oliver shortly after receiving a yellow card . Manchester United summer signing Di Maria trudges off the Old Trafford pitch after his dismissal . The main talking point from the match was the latest episode in what has been a largely disappointing start to Di Maria 's career at Old Trafford . After being cautioned for simulation , the former Real Madrid midfielder remonstrated with referee Oliver and then grabbed the back of his shirt and yelled at the official when he had turned his back on him . Replays showed the first booking on Di Maria was harsh and Aaron Ramsey had pulled the player back , but the £60million man 's actions thereafter deserved sanction , according to Van Gaal . ' I think he 's touched the referee and that 's forbidden in every country , so he has no excuses , ' the United manager said . 'In Spain he knows that he does n't touch the referee , but that is also in his emotion . ' I 've already spoken with him , he knows my opinion but also I have to see on the video . '
Angel di Maria was given second yellow card for pushing Michael Oliver . The Premier League playmaker received first yellow for dive . Danny Welbeck scored second-half winner to eliminate his former side .