The Serbian centre-back has constantly been linked with an Old Trafford departure over the past year or so but says he is content with the current situation at United prior to a potential future move to Italy.
"Before signing with United there was an interest from Fiorentina, a big club in which other Serbian players have played well in recent years" he told Corriere dello Sport.
"But I had the opportunity to sign for United and I think that many people would have made a choice like mine.
"A future in Italy? You cannot say what there is in the future.
"I am happy at United - everything here is great. I have won a lot and I don't have one reason to think about changing teams. In the future you never know."