Andre Villas-Boas must decide whether Hilario or Ross Turnbull will start his first home game in charge of Chelsea.
Villas-Boas this week lost undisputed number one Petr Cech (knee) for up to four weeks, meaning a change in goal for the visit of the Baggies to west London.
Romelu Lukaku could make his debut but the game comes too soon for fellow new boy Oriol Romeu, while David Luiz (thigh) remains out, Daniel Sturridge suspended, and Michael Essien long-term injured.
Albion have a major doubt over striker Peter Odemwingie while winger Jerome Thomas will definitely miss the game.
The pair sat out last weekend's opening match of the season against Manchester United and Odemwingie is battling to shake off an ankle injury while Thomas has hip and thigh problems.
Odemwingie is closer to fitness than Thomas but still faces a race against time and he will be assessed if he comes through training unscathed.
Right-back Steven Reid, who was forced off with a leg injury against United, is fit.
Central defender Gareth McAuley, who has been struggling with illness, could be on the bench against the Blues after coming through a midweek reserve game.
Chelsea (from): Hilario, Ivanovic, Bosingwa, Ferreira, Terry, Alex, Cole, Bertrand, Mikel, McEachran, Lampard, Ramires, Benayoun, Malouda, Torres, Drogba, Anelka, Kalou, Lukaku, Turnbull.
West Brom (from): Foster, Fulop, Reid, Tamas, Olsson, Shorey, Scharner, Brunt, Mulumbu, Morrison, Odemwingie, Long, Cech, Tchoyl, Ibanez, Thorne, Thomas, Dorrans, Jara, McAuley, Fortune, Bednar.