Mata, who is preparing to face AZ Alkmaar in the Europa League on Thursday, believes the club are going in the right direction despite their stuttering start this season.
“I think that when the club says we're going to take time and the manager as well, we don't believe it's going to be too long," the Spaniard told a pre-match press conference.
“I think this club, since I've been born, has always been winning. [Ole] has won here a lot as a player and, for me, personally, I have been here for a few years already and won a few things, but obviously, my aim in my mind is only to win something important with United.
“I believe that during my time here as a player we can do it.
“Obviously, we know other teams are doing things well and playing very good football, but I think that winning a trophy with United is possible and that, now, in the final part of my career, is my biggest opportunity."