Great. Koscielny was sent back to London with chronic Achilles problems. Ain't that just great? Right in the position where we have most cover
This bit here from Arsenblog sums up our situation (of Wenger's own making):
Wenger, surely, is smart enough to notice that starting the league with Koscielny, Mertesacker, Debuchy, Nacho, Gibbs, Chambers would not cut it. So why not sign a third stopper?