The Blues head into this clash on a high, having recently secured an impressive victory over Tottenham Hotspur.
Head coach Enzo Maresca believes that the momentum from the win against Spurs will prove vital as his side navigates a demanding fixture schedule.
The upcoming match arrives almost exactly two-and-a-half days after the final whistle at Stamford Bridge, leaving little time for rest or preparation.
Chelsea's performance against Spurs showed signs of growing cohesion under Maresca's leadership, and the Italian is confident that his players can carry that spirit into the Brentford encounter.
Despite the limited recovery time, he is optimistic about his side's readiness for the trip across the capital.
"Every time you win, preparation for the next game is better," Maresca said, according to the club's official website.
"Hopefully, from the Tottenham game we can build momentum knowing that every game will be difficult until the end.
"We need to recover energy and go again. For Sunday, it will be how we manage the tiredness. Brentford for sure will be a very tough game.
"You saw on Wednesday night they lost away at Newcastle, but it was a tough game. From now on, every game is going to be tough."
He added: "In terms of performance, every game is different. Our performance against Tottenham was perhaps better than other performances, but I was also happy with other performances because I know how difficult it is when teams sit back."