Valencia is nine appearances away from 300 in a Manchester United kit, with 22 goals and 61 assists as a Red Devil.
[ MORE: Monaco star’s Man City medical ]
Valencia said United has “been my life” since arriving from Wigan Athletic in 2009, while Mourinho heaped praise on the Ecuadorian captain’s character with glowing praise.
“It is no secret that I had been an admirer of Antonio’s long before I joined the club. I knew what a fantastic player he was and he has not disappointed me on that front. However, what I could never have imagined was what a great person he is. I know I have said this before but I truly believe it is a real privilege for us to have such a good player and such a good man. I am delighted he has extended his contract.”