Arsenal manager Mikel Arteta has said Viktor Gyokeres is a doubt for their Premier League trip to Chelsea this weekend.
Gyokeres last played for the Gunners at the start of November against Burnley. The Swedish striker has now missed the last four fixtures.
With Kai Havertz also recovering from a knee injury that has kept him out since the opening weekend of the season, Mikel Merino has been tasked with leading Arsenal's attack.