Toure joins Gunners backline absences
Arsenal have mounting defensive worries ahead of their Champions League Group G tie against Fenerbahce in Istanbul on Tuesday.
Centre-back Kolo Toure has been ruled out after twisting shoulder ligaments in Saturday's 3-1 victory over Everton.
Captain William Gallas (hamstring) and Bacary Sagna (knee) are carrying injuries sustained on international duty last week and are also unavailable after missing the match against the Toffees.
However, midfielder Samir Nasir has shaken off a knock picked up against the Merseysiders and Nicklas Bendtner (ankle) and Johan Djourou (head) both return after being absent at the weekend.