Serie A - Fiorentina snub City bid for Cerci
City boss Robert Mancini has expressed an interest in the winger, who scored seven times in Serie A for Fiorentina last term.
But the Florence club are not interested in selling the former Roma player.
Corvino said: "The only offer we have received is that of Manchester City for Cerci, but the proposal didn't satisfy us.
"Cerci is an important player for us. He didn't ask to leave and we have no plans to sell off our players."