Burnley's £12m centre forward Wout Weghorst is in line for an immediate debut, although Charlie Taylor and Ashley Barnes are set to remain out.
Maxwel Cornet is in contention following international duty, but Johann Gudmundsson is out with appendicitis and Josh Brownhill is suspended.
Watford trio William Troost-Ekong, Adam Masina and Imran Louza have returned from the Africa Cup of Nations.
Emmanuel Dennis serves a one-game ban.
MATCH FACTS
Head-to-head
- Burnley have kept a clean sheet in their last three league games against Watford - the same tally as in the previous 20 meetings.