Brahim Díaz is expected to miss the rest of the season with a knee ligament injury.
The Brazilian striker has been ruled out for the remainder of the season due to a knee ligament injury, which has left him unable to play in the Champions League and Copa del Rey this month.
Díaz's absence will be devastating for AC Milan, who currently sit at the bottom of the Serie A table with just one point from their last five games.
The club has already announced that they have signed Argentine striker Lucas Zelota as a replacement for Díaz, but it remains to be seen how long he can stay on the pitch without any significant impact.
Díaz's injury comes after he had been sidelined for nearly two months with a knee ligament strain, which forced him to miss all of the club's pre-season training sessions and matches.
It was hoped that Díaz would be back for the start of the season, but his absence could still leave the team struggling to find its form.
The club has also confirmed that they will be seeking a replacement for Díaz, with Italian international Fabio Capello set to take over as interim manager until a permanent solution can be found.
The club has already begun preparations for the upcoming season, with plans to strengthen the squad and try to improve their overall performance.