Arsene Wenger has made four changes to his Arsenal side for their Champions League Group A clash against Ludogorets Razgrad at the Emirates Stadium.
David Ospina returns in goal in place of Petr Cech, as he has done for the Gunners' previous two games in Europe this season.
Meanwhile, Kieran Gibbs comes in for Nacho Monreal at left-back, Francis Coquelin takes Granit Xhaka's place in midfield and Alex Oxlade-Chamberlain is in for Alex Iwobi up top.
Ludogorets manager Georgi Dermendzhiev has opted to keep faith with the same starting XI for the third Champions League match in a row.
Arsenal: Ospina, Bellerin, Mustafi, Koscielny, Gibbs, Cazorla, Coquelin, Walcott, Ozil, Oxlade-Chamberlain, Sanchez
Subs: Cech, Gabriel, Monreal, Xhaka, Elneny, Iwobi, Lucas
Ludogorets Razgrad: Stoyanov, Moti, Minev, Palomino, Natanael, Wanderson, Anicet, Dyakov, Misidjan, Marcelinho, Cafu
Subs: Borjan, Cicinho, Sasha, Quixada, Keseru, Plastun, Lukoki
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