New signing Samuel Kalu could make his Watford debut tomorrow at Burnley in a rescheduled Premier League tie but compatriot Emmanuel Dennis is banned for this crucial fixture.
Kalu joined Watford last month from French Ligue 1 side Bordeaux.
Dennis will miss the tie after he was sent off against Norwich City.
Fellow Nigeria star William Ekong has rejoined Watford after a disappointing AFCON outing in Cameroon, while Oghenekaro Etebo faces a late fitness test.
Etebo has been sidelined since last year with a quad injury that needed surgery.
Victory for Watford tomorrow under new boss Roy Hodgson will lift them from the relegation zone.