Chelsea's five-match winning run came to an end with a 0-0 draw at Brentford.
Graham Potter remains unbeaten as Blues boss but his side were kept at bay and given real problems in an enthralling-yet-goalless west London derby.
Brentford spurned a second-minute chance to take the lead when Rico Henry skipped away from Jorginho and teed up Ivan Toney, who rounded Kepa Arrizabalaga but was unable to get a shot off, with Marc Cucurella eventually clearing.
