The 20-year-old struggled to impose himself at No.9 against Derby County in the first half, missing a golden chance from Henrikh Mkhitaryan’s cross before striking the post once again after the break.
He hasn’t scored since the 2-1 defeat to Manchester City last month and picked up criticism for wasteful displays against Bristol City and Leicester.
But Mourinho, speaking after the 2-0 win over the Championship side, noted that he wasn’t worried about Rashford’s dip in form.
“Marcus, in training he scores unbelievable goals, he comes into matches and misses unbelievable chances, and hits the post, and the goalkeeper saves, so the players have these moments,” he said.
“I’m not worried with Marcus because a good moment will arrive and Jesse, if the negative moment arrives, I don’t think he will lose the stability he is showing.
“He is mature, he understands the game better, we speak about the areas I want him to play according to the different positions he can play, so clearly he is becoming a player.
“My feeling was that Rashford is not going to score a goal and because of that I am not going to lose time and I am going to play Romelu and I am going to sacrifice a player and Mkhi [Henrikh Mkhitaryan] was the one I sacrificed.”
We appear to have grown so accustomed to Rashford having a positive effect on games that the sight of him struggling feels almost unacceptable – like a betrayal of the ebullient youngster we’ve all grown to love.
But we have to remember that very notion: he is still a youngster, still firmly in the process of developing as a player and character.