Shkodran Mustafi is set to miss the rest of the year with a hamstring injury suffered during Arsenal’s 3-1 win over Stoke.
The German defender came off after 24 minutes at the Emirates, to be replaced by the fit-again Hector Bellerin.
Afterwards, Gunners boss Arsene Wenger confirmed Mustafi was facing at least three weeks on the sidelines.
The 24-year-old was signed from Valencia in the summer and has played 17 times for Arsenal this season.