West Brom could be without Salomon Rondon, who was sent home from training on Thursday with tonsilitis.
Saido Berahino is still working on regaining match fitness, while back-up goalkeeper Boaz Myhill remains out with an ankle problem.
Watford have several injury worries, with defender Younes Kaboul, midfielder Ben Watson and striker Isaac Success all facing fitness tests.
Defender Miguel Britos and midfielder Valon Behrami are both serving bans.
MOTD COMMENTATOR'S NOTES
Conor McNamara: "He's known for being a specialist in avoiding relegation, but could this be the first Premier League season that Tony Pulis finishes in the top half of the table?