Arsène Wenger has revealed the latest team news ahead of the Schalke game:

on the latest updates...
We lost Oxlade-Chamberlain, he will not be back. The only player who will be back in the squad, recovering, is Koscielny.

Copyright 2015 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to as the source 23 Oct 2012