Arsenal will be without Kieran Tierney for the first leg of their Europa League quarter-final at home to Slavia Prague on Thursday.
The Scotland full-back faces up to six weeks out with a knee injury, while Real Madrid loanee Martin Odegaard is also a doubt with a niggling ankle issue.
David Luiz (knee) is out, but Bukayo Saka (hamstring), Emile Smith Rowe (thigh) and Granit Xhaka (illness) return to the squad.
Arsenal provisional squad: Leno, Ryan, Bellerin, Chambers, Gabriel, Mari, Holding, Cedric, Ceballos, Elneny, Partey, Xhaka, Saka, Odegaard, Smith Rowe, Willian, Aubameyang, Lacazette, Nketiah, Martinelli, Balogun.