Juventus maintained their 100% home league record with a comfortable win over Chievo.
The Turin-based outfit has won all 12 of their home league matches this season.
Kwadwo Asamoah, Claudio Marchisio and Fernando Llorente scored for Juventus.
Martin Caceres had put through his own net to give Chievo hope at 2-1.
Asamoah’s left-footed shot from outside the area, after Fernando Llorente’s pass, gave Juventus the early lead.
It was doubled before the half hour mark as Claudio Marchisio bundled home from close range.
Caceres’s own goal gave the visitors brief hope after the break but that was extinguished soon after when Llorente headed home Andrea Pirlo’s corner.
Roma’s comfortable 3-0 win over ten-man Sampdoria on Sunday night reduced the gap at the top to nine points, after the reigning champions, Juve, had earlier opened up a 12-point lead.
Mattia Destro opened the scoring, the Italy forward pouncing following a corner at the end of the first half.
Miralem Pjanic doubled the lead with a 30-yard free-kick before Destro added the third following Gervinho’s flick.
Sampdoria’s night to forget was complete when Daniele Gastaldello was sent off for two bookable offences.
Third-placed Napoli won 2-0 at Sassuolo, who dropped to the bottom after Catania surprisingly overcame Lazio 3-1, to close the gap on Roma.