Gareth McAuley and Craig Dawson are available for selection against Crystal Palace after returning to West Brom training.
Northern Ireland defender McAuley has been sidelined with a hamstring injury while Dawson has been battling an ankle problem.
Head coach Tony Pulis is hopeful Jonny Evans could play following a hamstring issue but the former Manchester United defender faces a race against time to be fit.
Winger Callum McManaman (ankle) and midfielder James Morrison (hamstring) remain out.
Provisional squad: Foster, Myhill, Gamboa, Pocognoli, McAuley, Evans, Olsson, Chester, Dawson, Brunt, Sandro, Pritchard, Fletcher, Yacob, McClean, Sessegnon, Gardner, Rondon, Berahino, Lambert, Anichebe.