Ghana midfielder Sulley Muntari has been ruled of action for the next six months after undergoing surgery on a ruptured anterior cruciate ligament.
Muntari picked up the injury on Monday evening in Accra when he was playing in a traditional exhibition match played by Europe-based stars when on holidays.
The 27-year-old landed awkwardly after going in for a tackle on his international team mate Christian Atsu.
He went under the knife on Wednesday at the La Madonnina clinic in Milan.
A Milan statement said: '' Muntari underwent surgery for the reconstruction of the anterior cruciate ligament in his left knee.
''The recovery time is around five to six months, excluding complications.''
This is a big blow to the player whose career swiftly improved after joining the Rossoneri in January from rivals Inter.
Muntari scored three goals in 13 Serie A appearances last season.