Team news from the Hawthorns sees Pedro thrown in for his Chelsea debut.
John Terry, called finished by some a week ago, starts.
Saido Berahino – the subject of intense scrutiny – is left out by West Brom.
West Brom: Myhill, McAuley, Dawson, Olsson, Brunt, Yacob, Fletcher, McManaman, McClean, Morrison, Rondon.
Subs: Chester, Lescott, Gardner, Anichebe, Lambert, Gnabry, Rose.
Chelsea: Courtois, Ivanovic, Terry, Zouma, Azpilicueta, Fabregas, Matic, Willian, Hazard, Pedro, Costa.
Subs: Begovic, Falcao, Mikel, Traore, Remy, Cahill, Loftus-Cheek.
Referee: Mark Clattenburg (Tyne & Wear)