Unai Emery shuffles his deck for the visit of Cardiff, making seven changes to the side that lost to Manchester United. In come Leno, Mustafi, Lichtsteiner, Monreal, Elneny, Guendouzi and Ozil, the latter of whom is the captain. Cech, Ramsey, Iwobi and Xhaka drop to the bench, while Laurent Koscielny and Sokratis Papastathopoulos are injured. Ainsley Maitland-Niles is also not in the squad.
Cardiff subs: Alex Smithies, Kenneth Zohore, Rhys Healey, Nathaniel Mendez-Laing, Junior Hoilett, Greg Cunningham, Kadeem Harris.
Cardiff XI (4-1-4-1): Neil Etheridge; Lee Peltier, Bruno Ecuele Manga, Sol Bamba, Joe Bennett; Aron Gunnarsson; Callum Paterson, Harry Arter, Joe Ralls, Bobby Reid; Oumar Niasse.
Arsenal subs: Petr Cech, Eddie Nketiah, Granit Xhaka, Carl Jenkinson, Aaron Ramsey, Alex Iwobi, Konstantinos Mavropanos.
Arsenal XI (4-3-1-2): Bernd Leno; Stephan Lichtsteiner, Nacho Monreal, Shkodran Mustafi, Sead Kolasinac; Matteo Guendouzi, Lucas Torreira, Mohamed Elneny; Mesut Ozil; Pierre-Emerick Aubameyang, Alexandre Lacazette.