Arsenal's defensive depth continues to be tested ahead of their Premier League fixture against Aston Villa, despite a 2-0 win over Brentford on Wednesday.
Defender Cristhian Mosquera was forced off with an injury during the match, joining William Saliba and Gabriel Magalhaes on the treatment table.
The partnership of Jurrien Timber and Piero Hincapie held firm, but manager Mikel Arteta admitted he is worried about the mounting injury list ahead of Saturday's early game at Villa Park.
