Middlesbrough have no new injury concerns, with the likes of Gaston Ramirez and Cristhian Stuani returning unscathed from international duty.
Captain Grant Leadbitter, a long-term absentee, remains out along with James Husband.
Watford's summer signing Isaac Success could make his full debut after recovering from a leg injury.
Miguel Britos and Valon Behrami, could start following knocks, but Craig Cathcart and Daryl Janmaat are out.
MOTD COMMENTATOR'S NOTES
Steve Bower: "Both clubs will look at this fixture as a winnable one.
"For Middlesbrough, their form at the Riverside will be pivotal to their chances of remaining in the top flight.