Manchester ##pool were knocked out of the FA Cup by Arsenal on penalties . mark 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 horn , who labelled cup - winner fielding ' a mistake ' 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 .