After joining Manchester United from Everton for a fee of £27.5million in 2013, the afro-haired Belgian has received his fair amount of flak from fans for his performances.
But he played a starring role in United’s 2-0 win over Ajax in the Europa League final on Wednesday in Stockholm.
Having previously been seen as a misfit, Fellaini has won over Mourinho and he made 47 appearances in all competitions this term.
And he insists there’s nothing he wouldn’t do for the Portuguese tactician.
Manchester United stars celebrate Europa League win Fri, May 26, 2017
Click through the gallery for the best snaps of Jesse Lingard and Marcus Rashford enjoying Manchester after their Europa League victory
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Jesse Lingard and Marcus Rashford enjoy a night on the town after Man Utd's win
Marouane Fellaini is prepared to play through the pain barrier for Jose Mourinho
If I have to break my foot for him [Mourinho], I’ll do it
“When I feel that people trust me, I’m prepared to do everything,” Fellaini told Belgian paper hln.be.
“If I have to break my foot for him [Mourinho], I’ll do it.
“That’s me. Even when I’m in pain, I play.”
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Marouane Fellaini has won over Jose Mourinho's trust
Fellaini had his contract triggered by an additional year back in January, and feels he is comfortable at the club, adding: “Now I am here at Manchester United, I'm in and want to stay here.
“I work every day with great players, with great staff, at a great club and I'm happy to be here and try to give everything for this club.”