Arsene Wenger’s injury list continues to grow, as a knock to Alex Oxlade-Chamberlain (hip) in Saturday’s defeat to Norwich means he joins Bacary Sagna (leg), Theo Walcott (rib), Laurent Koscielny (back) and Abou Diaby (thigh) on the sidelines.
Kieran Gibbs may be passed fit after suffering with a thigh strain, but it is unlikely that he will be risked ahead of Andre Santos.
One piece of more pleasing news for Arsenal is the return of Jack Wilshere to fitness. However, after playing 90 minutes for the Gunners’ Under-21s on Monday, it is unlikely that he will feature.
Schalke will likely be without 19-year-old German international Julian Draxler, who broke his wrist during their 2-2 draw with Montpelier during their last Champions League outing, however, manager Huub Stevens suggested before their clash with Dortmund at the weekend that he may play with a cast on his arm if he feels comfortable enough.
Kyriakos Papadopulous is suffering from a bout of chicken pox and will be unavailable while Christoph Metzelder (knee) is also a doubt.