Walcott winning cup fitness battle

Theo Walcott is expected to recover from a slight hamstring strain for the FA Cup tie at Leyton Orient.

Centre back Johan Djourou is also likely to be included in the squad if he recovers from a back problem he suffered against Barcelona in midweek.

Right-back Bacary Sagna is available after returning from suspension but midfielder Abou Diaby is still banned.

Striker Marouane Chamakh will return to the squad after missing out against Barcelona.

Arsenal (from): Szczesny, Eboue, Koscielny, Clichy, Song, Djourou, Arshavin, Wilshere, Walcott, Bendtner, Chamakh, Fabregas, Nasri, van Persie, Almunia, Rosicky, Sagna, Denilson, Squillaci, Gibbs.