Theo Walcott, Laurent Koscielny and Gervinho are all ruled out of Arsenal's match against Olympiakos.
Arsene Wenger has confirmed that Theo Walcott, Laurent Koscielny and Gervinho will all miss the Champions League fixture against Olympiakos tomorrow evening.
England winger Walcott injured his knee during the 3-0 victory over Bolton Wanderers on Saturday afternoon and missed this morning's training session as a result.
Centre-back Laurent Koscielny suffered an ankle injury in the same game following a challenge by Wanderers midfielder Nigel Reo-Coker.
Ivorian Gervinho is currently suffering from a muscular problem and will not be risked at the Emirates Stadium.
Wenger did reveal that they could all return for Sunday's derby against Tottenham Hotspur.
Theo Walcott misses training >