In an interview with 'Elevate', the official magazine for Air Serbia, Matic opened up about life under the Portuguese and he was glowing in his praise.
Matic said that Mourinho was a big factor in his decision to join United in the summer and whilst the Serbian international concedes that Mourinho 'sometimes it isn't easy to work with' due to his incredibly high standards, he insists that he has never worked with a better boss.
'Mourinho is a brand, and the best coach I've ever worked with,' Matic explained.
'Sometimes it isn't easy to work with him, because he always demands more.
'Even when you play the best match in your career, he considers that you can play better in the next match.
'I co-operated excellently with him at Chelsea, and the fact that Mourinho is the coach at Manchester was the decisive factor in my choosing my new environment.
'Privately he's completely different from the way he is perceived by the general public.
'This is a man who possesses all human virtues. He's not at all cold or conceited, as he is presented in the media.
'He has created an excellent group of players with huge potential, and everything is there for us to achieve good results.
'I don't want to talk about the goals of the club, but when I mention Manchester United I think the ambitions are clear to everyone.
'We will do our best to achieve the results that previous generations had.'