Milan have been forced to revise plans after learning Thiago Silva and Mathieu Flamini have suffered injuries.
The club confirmed Silva will head back to Brazil and have a problem to his menicus looked at by the Selecao's medic. There are fears the centre back could be out for between four-to-six months, but nothing is official yet. Meanwhile Flamini could be out for a month.
A statement reads:
"Milan doctor Gianluca Melegati communicates Thiago Silva had a scan which showed a lesion to the medial posterior meniscus of the right knee. The player will head to Rio de Janeiro for a consultant with professor Jose Luiz Runzo - the Brazil team medic.
"Flamini underwent a scan also and it showed a lesion to his medial ligament in his right knee. The prognosis is three to four weeks."
Both men sustained the injuries during Milan's 2-0 home loss to Ajax in the Champions League on Wednesday.