Mattia De Sciglio and Philippe Mexes are out of Milan’s squad for the Audi Cup and the Guinness International Champions Cup.
The defensive duo have been omitted from Massimiliano Allegri’s party because of injuries.
The Italian has twisted his left knee which will require more tests within the next two weeks. Mexes, meanwhile, has suffered a muscle strain.
Milan are struggling for centre-backs at the moment given that Daniele Bonera has been ruled out of action for the next three months.
Mario Balotelli, Riccardo Montolivo and Cristian Zapata will meet up with the rest of the squad in Frankfurt on August 2, ahead of their trip to the United States.
Squad: Abbiati, Amelia, Gabriel; Antonini, Constant, Iotti, Pacifico, Pinato, Vergara, Zaccardo; Boateng, Cristante, Emanuelson, De Jong, Muntari, Nocerino, Poli, Traorè; Kingsley Boateng, El Shaarawy, Niang, Petagna.