Milan: A pair of late goals courtesy of Arturo Vidal and Claudio Marchisio handed Juventus a 2-0 win over Torino in the Turin derby and kept the champions on track for a successful title defence. (Agencies)
Elsewhere, Fiorentina maintained their bid for a third place finish thanks to a 3-0 rout of Sampdoria away although La Viola were pushed back down to fourth when Milan secured a come-from-behind 4-2 win over plucky Catania.
Earlier Sunday Pablo Osvaldo scored a hat-trick and Erik Lamela one goal as Roma trounced Siena 4-0 at the Olympic Stadium to move up to fifth, while Palermo moved out of the relegation zone thanks to a shock 1-0 win at home to Inter Milan.
Inter's 13th reverse of the season was compounded by an Achilles tendon injury suffered by captain Javier Zanetti, and left the Nerazzurri in seventh, eight points off Fiorentina, who occupy the third and last Champions League place.
Juventus started the day having seen their 11-point lead over Napoli reduced to eight after the southerners' win over Pescara in Saturday's late game.
And after a stubborn display from the hosts at a rain-hit Olympic Stadium, it took a sublime goal from Vidal four minutes from the final whistle to send Juve's bench into raptures.
Six minutes later Marchisio sealed Juve's 25th win of the campaign which restored their 11-point lead on Napoli with just 12 points up for grabs in the remaining four games.
"Compliments to Torino because they made life difficult for us. But we wanted to win this game and we achieved that aim," said Juve coach Antonio Conte.
Milan: A pair of late goals courtesy of Arturo Vidal and Claudio Marchisio handed Juventus a 2-0 win over Torino in the Turin derby and kept the champions on track for a successful title defence.