Arsenal boss Mikel Arteta gave the media an injury update ahead of Sunday's trip to Stamford Bridge to face Chelsea (16:30 BST), according to BBC News.
Arteta confirmed Cristhian Mosquera's withdrawal against Aston Villa was "more precaution than anything else," with the club assessing his fitness before deciding on his involvement.
The Arsenal manager also touched on the fitness of other squad members and discussed the future of academy talent Ethan Nwaneri, though further details on those topics remain limited in the initial briefing.
With Chelsea awaiting in a heavyweight London derby, Arteta's team news will be closely watched as Arsenal look to maintain their strong start to the Premier League season.