John Terry is back in the starting line-up.
Ross Turnbull will keep goal with Hilario on the bench and up front, Fernando Torres starts. There is also a place for Marko Marin on the right with Ryan Bertrand on the left and Oscar moving in to the middle.
Yossi Benayoun, back from loan at West Ham, is on the bench.
The full Chelsea team is :
Turnbull; Ivanovic; Cahill, Terry (c), Cole; Ramires, Lampard; Marin, Oscar, Bertrand; Torres.
Subs: Hilario, Ferreira, Azpilicueta, Ake, Benayoun, Mata, Ba.
The Brentford line-up is:
Moore; Hodson, Dean, Craig, Logan; Douglas, Diagouraga; Donaldson, Forshaw, Forrester; Trotta.
Subs: Lee, Barron, Reeves, Adeyemi, Dallas, Saunders, Hayes.
The referee is Jonathan Moss.