The midfielder is sidelined with a calf injury, however, Hornets manager Javi Gracia confirmed he will have Jose Hobelas and Andre Gray available as his side continues their push for a European place.
Gracia said: "(Jose) Holebas is available for the next game, all the internationals came back in good condition and all are ready to play.
"We only have Tom Cleverley in this moment with a problem in his calf. We will see his evolution next week, he has a problem. The rest of the players are available.
"Andre Gray had small problem last week after the last game, but he's been training all week and he's ready.
"It's good work from all the different departments of the club
"The players are good professionals, that do all the things we say, and after the physio and the people working in the canteen, all the people around the club is doing a good job.
"In this moment, we have nearly all the players ready to compete for the most decisive part of the season."