For weeks, the Italian media have been salivating about the new Milan trio -- Ka-Pa-Ro -- after Brazilians Kaka, Pato and Ronaldo -- and they combined for four of the five goals.
In its previous seven league matches - five draws and two defeats - Milan managed just three goals, they matched that mark just 30 seconds into the second half against Napoli.
With Milan short on strikers, Coach Carlo Ancelotti gave Pato a start in his first game eligible for Milan, and Ronaldo was only playing his second game of the season.
Ronaldo scored after the first quarter of an hour and added a second goal at the start of the second half. Pato was twice denied by Napoli keeper Gennaro Iezzo in the first half -- Clarence Seedorf scored Milan's second goal off a rebound on Iezzo's second stop -- before finally beating Iezzo on a breakaway in the 74th minute.
Minutes earlier, Kaka scored from the edge of the box for his first Serie A goal since October.