"Menez has an infection in the area he was operated on, he is taking antibiotics," said Mihajlovic. "He will be out until January or February."
Mihajlovic hinted at a potential deal for Kevin-Prince Boateng once the transfer window opens, however, after the Ghanaian impressed during his time training with the club.
He's training well, in January he will decide what to do," he said. "He's a player with quality and personality.
"He had some problems with his knee but he's been doing well up until now. He could play in the attacking midfield role. He can play out wide, in midfield - he can do different roles, and do them well."