Chelsea head coach Thomas Tuchel will provide an update on the fitness of his players on Friday.
Thiago Silva, Tammy Abraham and Jorginho are all nearing a return, while N'Golo Kante and Callum Hudson-Odoi returned early from international duty because of injuries.
West Brom loanee Conor Gallagher is ineligible to face his parent club.
Hal Robson-Kanu will be in the squad despite being sent home from Wales duty for a breach of coronavirus protocols.
LAWRO'S PREDICTION
Chelsea have not conceded in any of their past seven matches in all competitions, while West Brom have scored twice in the same number of games.