Manchester United were knocked out of the FA Cup by Arsenal on Monday . Danny Welbeck came back to haunt his former side with the winner . The Premier League is in a state of flux and it has been suggested that this season's title race could be decided by who finishes bottom rather than winning it. Many mocked Manchester United , in particular Louis van Gaal , who labelled match-winner Welbeck ' a substitute ' prior to the match .
Manchester United were knocked out of the FA Cup by Arsenal on Monday . Danny Welbeck came back to haunt his former side with the winner . The game unsurprisingly went viral on social media . Many mocked Manchester United , in particular Louis van Gaal , who labelled match-winner Welbeck ' a substitute ' prior to the match .