Sol Campbell is facing surgery on a broken nose, which could rule him out for up to three weeks ahead of tomorrow's Barclays Premiership clash with West Brom at Highbury.
Philippe Senderos is the likely man to come back into defence should it be decided the England centre-half, only just fit again, needs an immediate operation.
Emmanuel Eboue, Cesc Fabregas and Gilberto are likely to return to the starting XI after being rested for the midweek draw at Portsmouth, but left-back Ashley Cole (ankle), Pascal Cygan (hamstring) and long-term absentee Lauren (knee) are all still out.
Nathan Ellington is on course to return from a foot injury as West Brom look to pull off a shock result at Highbury to boost their Premiership survival hopes.
Ellington missed the goalless draw at Aston Villa but is back in training and could play some part against the Gunners.
Long-term absentees Thomas Gaardsoe (hernia) and keeper Chris Kirkland (broken finger) are the only other casualties for the Baggies.
Arsenal squad: Lehmann, Djourou, Campbell, Eboue, Senderos, Toure, Flamini, Ljungberg, Song, Diaby, Reyes, Fabregas, Gilberto, Hleb, Pires, Henry, Adebayor, van Persie, Bergkamp, Walcott, Almunia.
WBA squad: Kuszczak, Watson, Davies, Clement, Robinson, Gera, Quashie, Wallwork, Greening, Kamara, Campbell, Vaesen, Kanu, Ellington, Nicholson, Inamoto, Albrechtsen, Carter.
