Graham Potter has handed a first start to young striker Armando Broja. Conor Gallagher also gets a first start under Graham Potter.
See the line-up below
Brentford starting XI: Raya, Pinnock, Mee, Zanka, Roerslev, Onyeka, Jensen, Janelt, Henry, Mbeumo, Toney.
Subs: Cox, Canos, Dasilva, Wissa, Ghoddos, Ajer, Lewis-Potter, Damsgaard, Baptiste.
Chelsea starting XI: Arrizabalaga, Azpilicueta, Chalobah, Koulibaly, Cucurella, Jorginho, Gallagher, Loftus-Cheek, Mount, Havertz, Broja.
Subs: Mendy, Silva, Kovacic, Aubameyang, Pulisic, Sterling, Zakaria, Ziyech, Chukwuemeka.