In-form Watford forward Emmanuel Dennis is a doubt after he was substituted with an ankle injury in the defeat at Leicester City.
Ismaila Sarr could miss a month because of a knee issue but Adam Masina should be available and Juraj Kucka will be assessed.
Chelsea midfielder N'Golo Kante will miss a second match due to the knee injury sustained against Juventus.
Reece James, Jorginho and Timo Werner all face fitness tests.
LAWRO'S PREDICTION
Chelsea did not get the result they wanted against Manchester United on Sunday, but their performance was really good.
I'd imagine we will see more of Blues striker Romelu Lukaku here after he came off the bench late on against United, and that is not good news for Watford.