Napoli have beaten A.C. Milan 3-1 at the Stadio San Paolo thanks to an Edinson Cavani hat-trick.
The visitors took the lead on 12 minutes when loan signing Alberto Aquilani headed in Antonio Cassano's floated cross.
The home side were level almost instantly as Cavani tapped in.
Cavani, who scored in Wednesday's Champions League draw with Manchester City, gave his side the lead at the break when he hammered in an unstoppable shot past Christian Abbiati in the Milan goal.
The striker claimed his hat-trick five minutes into the second half when he instinctively smashed the ball home.
The win takes Napoli to the top of Serie A, while Milan are one place above the relegation zone.
