Fiorentina coach Delio Rossi expects to keep hold of attacking pair Stevan Jovetic and Alessio Cerci.
Jovetic is a target for Chelsea, while Manchester City are chasing winger Cerci.
Rossi said: "Jovetic is a very important player, but I haven't had a chance to train him yet. Alessio Cerci has quality and I'll try to bring the best out of him, but I don't know if I'll be able to. Let's just say the tactics are like a Rubik's Cube and I'll keep on trying."