The Juve winger struck just before half-time to cement the Old Lady's position at the top of Serie A.
Furthermore, it gives Antonio Conte's men confidence for their next two meetings with the Viola in the last 16 of the Europa League.
Napoli moved to within three points of second-paced Roma, opening up a 10-point gap over Fiorentina in fourth thanks to a 1-0 win over the Giallorossi on Sunday evening.
Jose Callejon scored the only goal of the game nine minutes from time as Rafa Benitez's men strengthened their claim for Champions League football against next season.
Elsewhere, Rodrigo Palacio's first-half header gave Inter Milan a narrow 1-0 victory over Torino.
Palacio nodded in the only goal of the game on the half-hour mark as Inter returned to winning ways after draws in their previous two league games.
Atalanta edged 10-man Lazio 1-0 for their first win on the road since October 5.
Maximiliano Moralez's goal on the hour mark was the difference between the two sides at the Stadio Olimpico.
Lazio shot themselves in the foot two minutes after conceding the goal when playmaker Antonio Candreva was sent off for a second yellow card.
Alberto Paloschi scored twice from the penalty spot as relegation-battling Chievo eased past Genoa 2-1.
Paloschi put the hosts ahead in the fifth minute and that goal looked as if it would be the winner for the much the match.
However, in a dramatic finale, Alberto Gilardino equalised two minutes from time for Genoa, only for Paloschi to convert his second spot-kick on the final play of the game after substitute Dejan Lazarevic was fouled by Marco Motta in the area.
Sampdoria came from two goals down to beat Livorno 4-2 with a rousing second-half display at the Stadio Luigi Ferraris.
Ibrahima Mbaye scored his first goals in Serie A to crown one of Livorno's best halves of football this season, but that was still not enough to ease their relegation worries.
Instead, Domenico Di Carlo's men capitulated in the second half with Nenad Krsticic bringing Samp back into the game before a Federico Ceccherini own goal drew them level.
Stefano Okaka and Manolo Gabbiadini then sealed the win for the Blucerchiati to take them 13 points clear of their opponents, who remain inside the bottom three having wasted a great chance to move out of danger.
Parma pulled ahead of Hellas Verona in the race for European qualification with a 2-0 win at Stadio Ennio Tardini.
Jonathan Biabiany's first-half goal set them on their way and after keeping Verona at bay in the second half, they added a second in stoppage time through Ezequiel Schelotto.
Meanwhile, bottom-side Sassuolo marked their managerial change as they halted a run of seven straight defeats with a goalless draw at Bologna.