Fellaini has proved a vital cog in Mourinho’s side since his arrival as manager at Old Trafford last year.
And Belgian journalist Kristof Terreur has revealed how the Portuguese has got the best out of Man Utd’s towering midfielder.
“Fellaini has been very happy since Jose joined,” he said on The Transfer Window podcast.
“A phone call from Jose Mourinho two summers ago persuaded him that this manager believes in him.
“Everybody knows how Mourinho works and I know Fellaini pretty well and I knew it would be a match made in heaven.