Watford will be without Chilean defender Francisco Sierralta if Fifa choose to impose regulations suspending players who did not report for international duty.
Joao Pedro could return from a knee injury sustained in July and summer signing Ozan Tufan may make his debut.
The participation of Wolves forward Raul Jimenez will also depend on Fifa's stance on international absentees.
Jonny Otto, Pedro Neto and Hugo Bueno remain out.
LAWRO'S PREDICTION
Watford have lost their past two games after starting their season with a win over Aston Villa and I don't see that run ending this weekend.