Arsenal could be boosted by the return of Rob Holding for Sunday's trip to Leicester City in the Premier League.
The centre-back was taken off with a suspected concussion in the defeat to Manchester City last weekend and played no part in Thursday's dramatic 3-2 triumph over Benfica in the Europa League.
However, Arsenal confirmed in an injury update that Holding returned to full training on Saturday and is ready to play a part against Leicester at the King Power Stadium this weekend.
The 25-year-old penned a new deal at the Emirates Stadium last month after becoming a vital player for Mikel Arteta, and he has made 20 Premier League starts for the Gunners this term.
Arsenal are eight places and 15 points behind third-placed Leicester in the Premier League table heading into Sunday's battle, and Holding's return means that third-choice goalkeeper Alex Runarsson is their only absentee at the moment.