The young striker has had successful surgery on a metatarsal fracture, but is set to miss the start of the Serie A season.
Milan forward M'Baye Niang is set for a lengthy spell on the sidelines after undergoing surgery on a fractured metatarsal.
The Frenchman went under the knife to treat the injury to the fifth metatarsal in his right foot.
A Milan statement revealed that Niang will have an X-ray in six weeks' time in order to establish a "more accurate recovery time".
Niang returned to San Siro ahead of the 2015-16 campaign after spending the latter half of last season on loan at fellow Serie A side Genoa, for whom he scored five goals in 14 league appearances.