Manchester United manager Louis van Gaal congratulates Marcus Rashford (left) on his performance as he is substituted against Arsenal. Old Trafford, February 2016.

Manchester United manager Louis van Gaal congratulates Marcus Rashford (left) on his performance as he is substituted against Arsenal. Old Trafford, February 2016.

Manchester United manager Louis van Gaal congratulates Marcus Rashford (left) on his performance as he is substituted during the Barclays Premier League match against Arsenal at Old Trafford, February 2016.