The Danish striker is believed to have been involved in a minor car accident on Sunday.
Nicklas Bendtner has been ruled out of Arsenal's clash with Olympiakos after being involved in a car accident.
It is not known the full extent of the injury sustained by Bendtner, but he will miss the visit of Greek champions Olympiakos on Tuesday.
Bendtner, who played the full 90 minutes of Saturday's 1-0 win over Fulham, is expected to be back for next weekend's clash with Blackburn.
"Nicklas did not practice because he had a car accident yesterday," said Wenger.
"Fortunately there was no real long-term damage, but he was bruised and we thought it was better he did not train.
"He should be back for Sunday's game [against Blackburn]."
Theo Walcott misses out again as he continues his recovery from a back injury, but Eduardo is available after missing the win over Fulham.
Wenger believes Walcott could return to action against Blackburn on Sunday and he plans to play the England winger in a practice match so that he can work on his fitness.
"He's available, but he is short of competitiveness at the moment," Wenger said of Walcott.
"He needs a game and we will organise a game for him.
"He should be back to normal again from Sunday onwards."
Sighhhh, hubby, sigh.