Arsene Wenger is expected to make changes for the EFL Cup visit of Reading.
Youngsters Ainsley Maitland-Niles, Rob Holding, Jeff Reine-Adelaide and Chuba Akpom played in the 4-0 win at Nottingham Forest in the previous round and could feature again along with Spanish forward Lucas Perez.
Oliver Giroud could return from a toe injury but Aaron Ramsey (hamstring), Per Mertesacker and Danny Welbeck (both knee) are still missing.
Provisional squad: Cech, Martinez, Ospina, Debuchy, Maitland-Niles, Holding, Gabriel, Monreal, Gibbs, Coquelin, Oxlade-Chamberlain, Reine-Adelaide, Xhaka, Akpom, Elneny, Lucas, Mavididi, Iwobi, Giroud.