Arsene Wenger admits goalkeeper Lukasz Fabianski is a 'major doubt' for Tuesday's Premier League match at home to Everton.
The Arsenal manager revealed on Monday that the Polish international picked up a rib injury in the north London side's 3-1 win over Norwich on Saturday.
If Fabianski is unable to play, Wenger may be forced to reinstate fellow Polish goalkeeper Wojciech Szczesny.
He has been recently relegated to the bench in favour of Fabianski after a form slump, something which the Arsenal manager has described as a 'blip'.
Meanwhile, Tomas Rosicky is back in the squad after successfully recovering from a hamstring injury which saw him sit out Arsenal's win against Norwich.
The Czech international scored both goals in the 2-0 victory at West Brom when he was last in action.
Per Mertesacker is also available after returning from suspension. The German centre-back picked up a one-match ban when he was shown a straight red card against West Brom.