Fiorentina team manager Vincenzo Guerini says they need a squad "revolution".
Guerini took charge of coaching in the final weeks of the season after Delio Rossi's dismissal.
"I doubt more than four players will remain next season. This team has to be revolutionised," Guerini told Brescia Oggi.
"Right from the start this side had within it the possibility of a disastrous season. Too many players were unhappy, coming to the end of their contracts or just lacking enthusiasm.
"Rossi arrived, who is a maestro of football. We thought he could change the direction of the squad, but in January three strikers left. Despite it all, this isn't a bad team, but the problems that needed resolving were too complex."