Mata has only six months left on his contract and the club has reportedly not given him a new deal yet. The player can speak to clubs and sign a pre-contract agreement and leave for free in the summer.
However, the player has remained calm about the situation and is not worried about not having a contract yet, while also suggesting that a return to Spain in the near future is unlikely.
"I don't know. I've been in England for a good while, in a league that I'm well accustomed to and where I've adapted well, but it's true that at times you miss home, your family, your friends. But I don't know if I'll return to Spain in the near future," he told AS.
"I'm calm [about the situation at United]. I'm at the fantastic club that is Manchester United, one of the biggest in the world. I have to think about the short term and do well from now on."
Juan Mata has been one of the better performers for Manchester United since he joined the club about give five years ago, but it remains to be seen if the club will offer a new deal to the Spaniard who is on the wrong side of 30.
There would, however, be no dearth of offers for the players once his deal does expire at the end of the season.