Juventus' win closes gap on AC Milan
Leonardo Bonucci scored from the center of the area in the 53rd minute at the Juventus Stadium, Arturo Vidal found the target in the 75th with an impressive solo effort, and Fabio Quagliarella finished off a counterattack in the 83rd as Juventus dominated from start to finish in a preview of the Italian Cup final.
Napoli was reduced to 10 men for the final five minutes after Juan Zuniga was sent off for elbowing Giorgio Chiellini in the face.
Milan was held to a 1-1 draw at Catania on Sunday and faces a tough test at Barcelona in the Champions League quarterfinals on Tuesday, following a 0-0 draw in the first leg at the San Siro.
Juventus, which remained undefeated in all competitions this season, holds the tiebreaker over Milan, with a win and a draw head-to-head.