Former Italy striker Luca Toni has announced his retirement from football after a career spanning three decades.
Juventus celebrated winning the Serie A title for the fifth year in a row by beating relegation-threatened Carpi 2-0.
Hellas Verona beat AC Milan but Carpi's 1-0 victory over Empoli confirmed relegation from Serie A for Luigi Delneri's side.
Paulo Dybala scored twice as Juventus thrashed Lazio 3-0 to take what could prove to be a decisive lead in Serie A.
Juventus moved a step closer to a fifth straight Serie A title after pulling nine points clear with a 4-0 win over Palermo.
Napoli are back within six points of Serie A leaders Juventus after beating bottom club Hellas Verona 3-0 on Sunday.