Southampton winger Nathan Tella could make his comeback from the groin injury which has caused him to miss the last nine games.
Goalkeeper Alex McCarthy and defender Lyanco remain long-term absentees.
Watford defender William Troost-Ekong is likely to be available after a groin strain, while full-back Jeremy Ngakia might return from a hamstring issue.
Forward Joao Pedro missed the defeat at Wolverhampton with Covid-19, while Ismaila Sarr is still out.
LAWRO'S PREDICTION
Watford boss Roy Hodgson has come in so late in the season that he is still searching for his best XI and is also unsure about which formation to use, which is far from ideal when you are stuck in the bottom three with time running out to get out of trouble.