Arsene Wenger is preparing to be without three first-team defenders for Wednesday night's derby against Chelsea.
Arsenal are without Nacho Monreal, Olivier Giroud and Aaron Ramsey for the meeting at Emirates Stadium, and Wenger fears Laurent Koscielny could join a growing injury list.
"We lost Sead Kolasinac in the West Brom game and Koscielny," he told the club's official website.
"Mesut Ozil might have a test but he hasn’t been out at all since Crystal Palace, so I don’t know.
"Koscielny is the Achilles again, it flared up. Yesterday the signs were not too encouraging. He is 30% available, 70% not."
Could this presumably be a worked over match for Chelsea?.