Alexis Sanchez scores on his Arsenal return to maintain Solskjaer's winning start

Alexis Sanchez scored on his return to the Emirates Stadium as Manchester United saw off Arsenal to reach the fifth round of the FA Cup and extend Ole Gunnar Solskjaer's winning start.

The two most successful sides in the competition's history played out an entertaining Friday night game as United secured a 3-1 win - an eighth straight victory for interim manager Solskjaer.