Watford could be missing as many as seven players for Saturday's visit of Southampton although Troy Deeney is available again.
Kiko Femenia, Will Hughes (both hamstring), Younes Kaboul (foot), Miguel Britos (ankle), Craig Cathcart, Nathaniel Chalobah and Isaac Success (all knee) remain sidelined.
Boss Marco Silva has said he does not know when any of the injured players will return and admits to being fed up with the club's focus on trying to get their walking wounded fit, rather than trying to sign new players.
He said: "It's frustrating for me and everyone. It's a big frustration for our players, they are unhappy at this moment. For me and I think it's for everyone.
"Sometimes when people talk about football, they only see the final part - how the team perform on the pitch.
"For us to be stronger as a team, to improve and grow up, you need to pay attention to everything."
The only good news for the Hornets is that skipper Deeney is available for the first time in four matches following the end of his suspension.
Provisional squad: Gomes, Zeegelaar, Wague, Janmaat, Kabasele, Cleverley, Doucoure, Watson, Pereyra, Richarlison, Carrillo, Karnezis, Prodl, Holebas, Capoue, Sinclair, Gray, Okaka, Deeney.