Everton forward Richarlison is back in full training and could play after a five-match absence with a knee injury.
Abdoulaye Doucoure is out with a fractured metatarsal, while Dominic Calvert-Lewin has suffered a setback in his recovery from a thigh problem.
Watford forward Joshua King has recovered from a knee injury but Kiko Femenia is a doubt.
Francisco Sierralta, Christian Kabasele and Peter Etebo are definitely unavailable.
LAWRO'S PREDICTION
I'm not sure what Watford were trying to do in their 5-0 defeat by Liverpool last weekend, in Claudio Ranieri's first game as Hornets boss.