Kieran Tierney makes his debut for Arsenal in tonight's Carabao Cup tie against Nottingham Forest at the Emirates.
Summer signing Tierney joined the Gunners from Celtic while carrying an injury, but starts at left-back against Championship side Forest.
In a further defensive boost for Unai Emery, Rob Holding also returns following a lengthy layoff after a serious knee injury, while Hector Bellerin - who suffered a similar injury last season - is on the bench.
Mesut Ozil starts after missing the last two games, with Emith Smith Rowe, Reiss Nelson and Gabriel Martinelli joining him in attack.
Joe Willock and Lucas Torreira are Emery's holding midfielders, while Bukayo Saka is among a young group on the bench.
Arsenal: Martinez, Chambers, Holding, Mustafi, Tierney, Torreira, Willock, Nelson, Ozil, Smith, Rowe, Martinelli
Substitutes: Macey, Bellerin, Bola, Burton, Ceballos, Saka, Balogun
Nottingham Forest: Muric, Cash, Figueiredo, Robinson, Ribeiro, Chema, Silva, Johnson, Carvalho, Lolley, Adomah
Substitutes: Smith, Milosevic, Grabban, Ameobi, Sow, Gabriel, Mighten
