Laurent Koscielny: Back Still Bothersome

Koscielny may undergo a scan on his injured back Thursday, and it is unclear if he will train Friday, manager Arsene Wenger said Thursday.

Analysis:

Koscielny missed last weekend's match due to the issue, which was made worse when Per Mertesacker missed out with an illness. Koscielny is apparently closer to playing than Mertesacker, though if they both have to sit again, Gabriel and Calum Chambers could start again.