Brighton will continue to monitor key midfielder Yves Bissouma, who has sat out two games with a knee problem.
Danny Welbeck and Steven Alzate are unavailable after being forced off at Crystal Palace, while Enock Mwepu and Adam Webster remain sidelined.
Arsenal's only absentee is midfielder Granit Xhaka, who will be missing for three months after suffering a knee ligament injury last weekend.
Albert Sambi Lokonga may replace Xhaka in the Gunners' starting line-up.
LAWRO'S PREDICTION
Brighton missed the chance to go top of the table on Monday but the way they snatched a point right at the end of their game against Crystal Palace will still give them a big lift.