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Manchester United ruthlessly punished defensive errors to become the first side to win a league game at Arsenal since January in one of the games of the season so far.
Jose Mourinho’s side were reduced to 10-men late on when Paul Pogba was sent off for a dangerous tackle and they were aided by a stunning goalkeeping
This post was originally posted on BBC News. Read the rest of the story at http://www.bbc.co.uk/sport/football/42119930.
