Mesut Ozil and Dani Ceballos have been recalled to the Arsenal starting line-up for the game at Vicarage Road.
Quique Sanchez Flores, back in charge of Watford, makes three changes, with Jose Holebas, Gerard Deulofeu and Etienne Capoue coming in.
Watford: Foster, Femenia, Kabasele, Dawson, Holebas, Capoue, Hughes, Doucoure, Cleverley, Deulofeu, Gray.
Subs: Gomes, Janmaat, Mariappa, Foulquier, Chalobah, Sarr, Pereyra.
Arsenal: Leno, Maitland-Niles, Sokratis, Luiz, Kolasinac, Ceballos, Guendouzi, Xhaka, Ozil, Aubameyang, Pepe.
Subs: Martinez, Chambers, Torreira, Saka, Willock, Nelson, Martinelli.