Watford expect to have midfielder Will Hughes available again following a hamstring problem for the Premier League match against West Brom.
On-loan Barcelona winger Gerard Deulofeu, though, faces a spell out after suffering a stress fracture in his foot during the win over Everton.
Craig Cathcart is set to resume training following his long-term knee problem, but Nathaniel Chalobah (knee), Younes Kaboul (foot), Tom Cleverley (thigh) and Isaac Success (knee) remain unavailable.
West Brom have an unchanged squad but boss Alan Pardew has said he will make changes to his team.
Pardew is in desperate need of a win, with his side bottom of the table and seven points adrift of safety, and he could recall the likes of Gareth McAuley, Jake Livermore, Chris Brunt and Hal Robson-Kanu.