Callum Hudson-Odoi has also shaken off a shoulder issue picked up with England Under-21s.
West Brom will be without young midfielder Conor Gallagher.
The 21-year-old is on loan from Chelsea and is ineligible for the game against his parent club.
Hal Robson-Kanu was sent home from Wales duty after breaching protocol but has tested negative for coronavirus. All the Baggies' international contingent are available for the match.
Chelsea provisional squad: Mendy, Azpilicueta, Silva, Zouma, Rudiger, Hudson-Odoi, Chilwell, Jorginho, Mount, Havertz, Ziyech, Giroud, Arrizabalaga, James, Christensen, Emerson, Alonso, Kovacic, Gilmour, Pulisic, Werner, Abraham, Anjorin.
West Brom provisional squad: Johnstone, Bartley, Furlong, Townsend, O'Shea, Pereira, Okay Yokuslu, Maitland-Niles, Phillips, Diagne, Robson-Kanu, Diangana, Grant, Peltier, Sawyers, Button, Snodgrass, Ajayi, Robinson, Livermore.