Watford are without winger Ismaila Sarr, who suffered a hamstring injury in last weekend's 0-0 draw with Manchester United.
Full-back Kiko Femenia is back in contention after missing the game at Old Trafford with a minor issue.
Arsenal welcome back Emile Smith Rowe, who sat out the win versus Wolves through illness.
Takehiro Tomiyasu is doubtful because of the calf injury that ruled him out of Thursday's match.
LAWRO'S PREDICTION
With three wins in a row, Arsenal are on a nice little run at the moment, and they are well placed in the race for fourth.