Ibrahimovic's contract with PSG will expire at the end of June, with United among numerous clubs reportedly interested in the decorated Swede's services.
The 34-year-old - a league winner in the Netherlands, Italy, Spain and France - recently expressed a desire to test himself in the English Premier League.
"I don't know what he is going to do, whether he is going to stay there or not," Mata told Sky Sports. "Maybe he will try a new chapter in his long career.
"He is probably the best in Sweden's history for what he represents. He has played in so many countries and leagues and won trophies everywhere. That speaks about his quality as a player and his importance for PSG and in the national team where he is a captain.
"He is a very good player and I like to play with very good players. Every player would be happy to play with him."
Ibrahimovic is PSG's record marksman with 141 goals, contributing 27 goals to their fourth straight Ligue One triumph this season.