Arsenal will be without Nacho Monreal and Sead Kolasinac for their Europa League clash with Sporting Lisbon.
Neither travelled to Portugal due to hamstring issues but Sokratis Papastathopoulos could return after an ankle problem.
Carl Jenkinson was part of the 21-man squad, with the full-back pushing to make his first Arsenal appearance in almost two years, while Laurent Koscielny, Ainsley Maitland-Niles and Petr Cech all remained at home despite returning to training following their injuries.
Provisional squad: Leno, Martinez, Iliev, Bellerin, Jenkinson, Lichtsteiner, Holding, Mustafi, Papastathopoulos, Xhaka, Elneny, Torreira, Guendouzi, Ramsey, Smith Rowe, Iwobi, Ozil, Mkhitaryan, Welbeck, Lacazette, Aubameyang.