Arsenal will be without both senior strikers Pierre-Emerick Aubameyang and Alexandre Lacazette for Friday's home game against Everton.
Aubameyang is still recovering from malaria which he contracted on international duty.
Arsenal hope he will be able to return to light training soon, which could see him available for next week's Europa League semi-final against Villarreal.
In-form Lacazette, who has six goals in his last seven games, remains a big doubt for the Villarreal tie due to a left hamstring injury he suffered in Arsenal's 1-1 draw against Fulham.