The Gunners are sweating on the fitness of Kieran Tierney and, if he is out, they need a solution at left-back.
Arsenal will also be without Pablo Mari for Monday’s match, but Gabriel Magalhaes is back fit and David Luiz and Rob Holding impressed in the draw with Palace.
Thomas Partey could make his first start in over a month after coming off the bench in Thursday’s draw with Palace.
Predicted Arsenal XI (4-2-3-1): Leno; Bellerin, Holding, Luiz, Saka; Ceballos, Xhaka; Pepe, Smith Rowe, Aubameyang; Lacazette
Monday 8.00pm GMT, Sky Sports
Arsenal squad from: Leno, Runarsson; Bellerin, Cedric, Chambers, Gabriel, Holding, Luiz, Mustafi, Tierney; Ceballos, Elneny, Maitland-Niles, Partey, Saka, Smith Rowe, Willock, Xhaka; Aubameyang, Balogun, Lacazette, Martinelli, Nelson, Nketiah, Pepe and Willian.
Doubts: Tierney (muscle tightness)