Robinho could be set for a spell on the sidelines after the Milan man picked up a right thigh muscle problem.
According to Sky Sport Italia, early indications suggest that the Brazilian international will be out for at least 10 days.
The former Manchester City player will thus have to watch the League game against Lazio, as well as the Malaga Champions League tie.
The 28-year-old, who missed a month earlier this season with muscle fatigue, has only made four appearances in Serie A this term – and three of those have come as a substitute.
Think you know your Italian football? Share your knowledge, tips and comments to win cash prizes in OLBG's World Cup tipster competition  - £10,000 to be won!