The Italian defender has been linked with a move to City.
“I have a contract until 2013 with Fiorentina and see no reason why I wouldn’t respect it,” he told the Nuovo Corriere di Firenze newspaper.
“In fact, I feel myself to be a central part of their plans for the future.
“I don’t know if it’s true that Manchester City want me, as no firm offer has come in. I am convinced that, even if City or another club did make an offer, I’d have no problems in turning it down.”