Unbeaten Napoli moved three points clear at the top of Serie A with a 3-1 win against Sassuolo at Stadio San Paolo.
Sami Khedira scored a first career hat-trick as 10-man Juventus recovered to trounce Udinese 6-2 at the Dacia Arena.
Sampdoria came from behind to record a 3-1 victory over Atalanta at the Stadio Luigi Ferraris on Sunday.
Udinese ended Sampdoria's unbeaten Serie A start with a 4-0 victory at Friuli, where midfielder Edgar Barreto was sent off.
Juventus kept pace with Napoli at the top of Serie A with a thumping 4-0 win against 10-man derby rivals Torino.
Ciro Immobile scored a hat-trick as Lazio humbled new-look AC Milan 4-1 at the Stadio Olimpico on Sunday.
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