Watford goalkeeper Ben Foster is a doubt for the home match against Middlesbrough tomorrow.
The on-loan Manchester United player twisted a knee during training this week, and the 23-year-old is likely to be replaced in goal by Richard Lee if he fails to recover.
Forward Marlon King is recovering well after missing the last three matches with a knee injury, and he is rated 50-50 by manager Adrian Boothroyd to figure against Middlesbrough. Defender Clarke Carlisle remains sidelined with a thigh injury.
Middlesbrough defender Andrew Davies could return to the side for tomorrow's trip to Watford after shaking off a back problem.
The 21-year-old missed Monday's 1-0 defeat at Manchester City after suffering a spasm in training the previous day. Replacement Stuart Parnaby is out with a foot injury.
Ugo Ehiogu (Achilles) has returned to light training but will not be available for several weeks, while striker Mark Viduka is out until next month with two broken toes.
Watford squad: Foster, Lee, Doyley, DeMerit, Shittu, Stewart, Mackay, Powell, Mariappa, Smith, Mahon, Francis, Bouazza, Spring, Bangura, McNamee, Young, Henderson, King, Priskin, Jarrett.
Middlesbrough squad: Schwarzer, Turnbull, Davies, Bates, Woodgate, Huth, Pogatetz, Taylor, Arca, Boateng, Cattermole, Morrison, Rochemback, Downing, Mendieta, Euell, Yakubu, Maccarone.
