Manchester United minority owner Sir Jim Ratcliffe has given head coach Ruben Amorim three years to prove himself and insists he will not run the club on "knee-jerk" reactions.The Portuguese is approaching the first anniversary of his appointment at Old Trafford, but his position has been under constant scrutiny since he took over on November 1 last year.

Manchester United minority owner Sir Jim Ratcliffe has given head coach Ruben Amorim three years to prove himself and insists he will not run the club on "knee-jerk" reactions.The Portuguese is approaching the first anniversary of his appointment at Old Trafford, but his position has been under constant scrutiny since he took over on November 1 last year.