Robinho will be out for four weeks with a dislocated shoulder, while Milan teammate Ignazio Abate sprained his ankle.
Both players picked up injuries during last night’s 3-0 Champions League victory over Celtic  in Glasgow.
This evening Milan released a statement confirming the test results were not reassuring for the stars.
Robinho has dislocated his left shoulder and, save complications, should be out for three to four weeks.
Abate sprained his left ankle and the medical staff will not be drawn on his recovery time yet, but it too is expected to be several weeks.