Arsenal goalkeeper Wojciech Szczesny will be out for another "two to three weeks" with an ankle injury, according to Arsene Wenger.
The 22-year-old Pole, who has been hampered by an ankle problem since the beginning of the season, has started just two matches for the club this campaign.
Meanwhile, Gunners midfielder Abou Diaby has also been ruled out for three weeks with a thigh injury.
Arsenal face Olympiakos in the Champions League on Wednesday.