Andrea Pirlo's goal from a curling, dipping free kick was the highlight of Juve's 3-0 win as the titleholders went seven points clear of second-placed Inter Milan. Mirko Vucinic set Juve on their way in the second minute and Claudio Marchisio scored the third.
AC Milan notched up their fourth successive league win, 4-1 against lowly Pescara, while Luca Toni scored twice as Fiorentina produced another impressive performance to beat Siena by the same score.
Roberto Donadoni's Parma also won 4-1, at home to Cagliari, while Sergio Pellissier's 87th-minute goal gave Chievo a 1-0 win over AS Roma.
Napoli were at home to Bologna in the late match (1945 GMT) where a win would lift them into second place. (Reporting by Brian Homewood; Editing by Clare Fallon)