The Belgian has endured a rough start to the campaign and was even booed by sections of the crowd after he gave away a late penalty moments after coming off the bench against Everton at the start of December.
He was called into action for yesterday’s 2-1 win over Middlesbrough after Michael Carrick missed the clash through illness and Mourinho was satisfied his display.
Speaking after the game, Mourinho was full of praise for Fellaini following his impact at Old Trafford.
“I’m really happy with Fellaini. I’m really happy with the way he played,” he said.
“The connection with the fans, I think they realised how useful he is, they realised how much he is with the team.”
United came from a goal down to win with two late goals and it was brilliant to see the side put in a showing reminiscent of Fergie’s era at Old Trafford.
Fellaini made a series of superb first touches, linking up the play well with his midfield partners, but he failed to offer anything else moving forward.
He had not started a game for United since November 6 and it was great to see that he could be relied upon when Mourinho needed him.