I don't know how many players will be fully fit to play.
Bellerìn, Koscielny, Gibbs, Coquelin, Ozil, Cazorla, Mertesacker, Debuchy, Elneny, Walcott and Welbeck are out for injuries. Alexis and Xhaka deserve a period to recover the better condition.
The player fully fit are Cech, Ospina, Martinez (3 GKs), Gabriel, Holding and Mustafi (3CBs), would be good to resume Jenkinson to put him on the right, Ramsey on midfield, Iwobi and Oxlade or Lucas on the wings, Giroud on attack plus Niles and Adelaide.
My ideal 11 should be: Ospina; Jenkinson, Mustafi, Holding, Monreal; Ramsey - ??; Oxlade - Iwobi - Lucas; Giroud.