Brahim Diaz and Theo Hernandez were already in sparkling form in Milan’s 5-0 friendly win over Serie C side Modena.
It took just two minutes to break the deadlock with a well-worked move, as Brahim Diaz and Theo Hernandez combined down the left for the Spaniard to drill in from a tight angle.
Former Real Madrid talent Brahim Diaz contributed to the second moments later, crossing from the by-line for a Rafael Leao header.
Fikayo Tomori got the third goal with another header on an Ismael Bennacer cross.
Another good passing move saw Bennacer, Brahim Diaz and Leao all involved setting up the Rade Krunic header.
Theo Hernandez completed the first half rout with a screamer from distance.
Stefano Pioli made numerous changes after the restart, including the debut for Fode Ballo-Toure.
Samu Castillejo and Lorenzo Colombo wasted good opportunities, while Jens Petter Hauge impressed with his work-rate.
Milan: Tatarusanu (Plizzari 60); Gabbia (Conti 46), Tomori (Caldara 46) (Stanga 60), Romagnoli (Gabbia 46), Theo Hernandez (Ballo-Toure 46); Bennacer (Robotti 46) (Capone 83), Tonali (Di Gesu 60); Saelemaekers (Castillejo 46), Brahim Diaz (Maldini 46), Krunic (Hauge 46); Leao (Colombo 46)