The Rossoneri are hoping to re-sign the Sweden international, who fired them to their last Serie A title in 2011, before leaving for France the following year.
Ibrahimovic appeared to end the Italians' hopes of bringing him back to San Siro when he stated at a press conference on Friday that he remains fully committed to PSG.
However, when asked again about the prospect of a return to San Siro on Sunday, Ibrahimovic was less definitive.
"I still have one year left on my contract," the striker told Channel 5. "I belong to PSG. I do not have another plan, but things can change from one day to another.
"I cannot say much now, but I belong to PSG and we will continue like that. But the older I get, the more I have to think differently about choosing a club.
"This concerns not only the footballing aspect, but also the quality of life for my family.
"Many people think that the number one criterion is the Champions League. But this is not true. I want to be in a club that I like, where I have a good time, and have fun playing football.
"If I do not win the Champions League, believe me, my career has been magical anyway. Check my track record; it speaks for itself."
Ibrahimovic has been a part of 12 title-winning sides during a career that has taken in spells with Ajax, Juventus, Inter, Barcelona, Milan and PSG.
The 33-year-old has also inspired his current club to three successive Ligue 1 triumphs, though the Champions League has always eluded him.