Milan 3-0 Atalanta
Brazilian playmaker Kaka surpassed 100 goals for AC Milan with two goals in a victory against Atalanta.
The 31-year-old, who last summer returned to the club for a second spell after joining Real Madrid in 2009, reached the landmark when he scored the opener following a counter attack.
Kaka got his and Milan's second with a close-range finish just after the hour, before teenager Bryan Cristante added a third with a low shot.
It was Milan's fifth win of the season.
Kaka has scored six goals since returning to AC Milan, who move up to 10th with 22 points following the win.
It was a positive start to the year for manager Massimiliano Allegri, who will leave the club when his contract expires at the end of the season.