Juventus legend Gianluca Vialli believes Napoli have blown their title chance.
Napoli were thumped by Fiorentina, just a week after victory at Juve.
Vialli said: "Napoli arrived at the game mentally wrong, Juventus was worse but with the match against Inter then Napoli got even worse.
"How do you react to these situations? Congratulations to them but perhaps the lack of experience has come out."
Napoli are now four points behind Serie A leaders Juve.