Possible lineups
Arsenal: Čech; Bellerín, Mertesacker, Koscielny, Monreal; Ramsey, Coquelin; Walcott, Özil, Sánchez; Giroud.
Out: Arteta (unspecified), Cazorla (knee), Gabriel (hamstring), Wilshere (calf/shin), Rosický (thigh)
Doubtful: none
Misses next match if booked: Özil, Giroud, Campbell
Barcelona: Ter Stegen; Dani Alves, Piqué, Mascherano, Alba; Rakitić, Busquets, Iniesta; Messi, Suárez, Neymar.
Out: Rafinha (knee), Arda Turan (suspended)
Doubtful: none
Misses next match if booked: Piqué…