Arsenal manager Mikel Arteta will provide an update on his squad selection at a press conference later on Friday.
Gabriel Martinelli is suspended as a result of his red card against Wolves last weekend.
Brentford head coach Thomas Frank has yet to reveal whether Christian Eriksen will make his much-awaited return to competitive action on Saturday.
Striker Ivan Toney has missed the past two games because of a calf injury.
LAWRO'S PREDICTION
Brentford ended their run of five defeats with a draw against Crystal Palace last weekend, but they still badly need a win to stop their slide down the table.