Mario Mandzukic and Cristiano Ronaldo scored either side of half-time while Gonzalo Higuain was sent off in AC Milan's loss to Juventus.
Gonzalo Higuain missed a penalty and was sent off in a nightmare meeting with Juventus as his woes cost AC Milan dear in a 2-0 loss at San Siro on Sunday.
Having overcome a back problem to start, Higuain - moved out on loan following Cristiano Ronaldo's arrival in Turin - might have wished he skipped the visit of his parent club after Wojciech Szczesny denied him from the spot in the 41st minute.
The champions had already established an eighth-minute lead through Mario Mandzukic and made the result safe thanks to Ronaldo's sealer nine minutes from time.