Arsenal could be without full-back Takehiro Tomiyasu for Tuesday's Carabao Cup quarter-final tie against Sunderland because of a muscle injury.
Defender Pablo Mari and midfielder Albert Sambi Lokonga are both out after testing positive for Covid.
Sunderland manager Lee Johnson said an unnamed player returned a positive Covid test on Monday and will miss the tie at Emirates Stadium.
On-loan forward Leon Dajaku is doubtful after suffering a knock at the weekend.