Watford will be missing several players for the Premier League match against Cardiff.
Forward Andre Gray (leg), midfielder Will Hughes (hip), Adalberto Penaranda (foot), defender Sebastian Prodl (knee) are all unavailable, while midfielder Etienne Capoue serves out his three-match ban.
Tom Cleverley is close to a return after being sidelined since January with hamstring and Achilles problems, but the midfielder will be carefully managed.
Provisional squad: Foster, Cathcart, Kiko, Holebas, Kabasele, Sema, Doucoure, Quina, Pereyra, Deeney, Success, Gomes, Mariappa, Masina, Wilmot, Chalobah, Deulofeu, Okaka.
Kenneth Zohore could return to the Cardiff squad.
Zohore has taken part in training this week after being sidelined by a calf muscle injury, although Bluebirds boss Neil Warnock is undecided in terms of any involvement for him at Vicarage Road.
Jazz Richards, though, is set to remain sidelined because of hamstring trouble as Cardiff look to build on last weekend’s win against Southampton.
Provisional squad: Etheridge, Smithies, Peltier, Bennett, Morrison, Manga, Connolly, Cunningham, Bamba, Arter, Ralls, Gunnarsson, Damour, Camarasa, Harris, Hoilett, Ward, Paterson, Reid, Murphy, Zohore, Mendez-Laing, Madine.