Chelsea slumped to a miserable fifth successive defeat under Frank Lampard as Brentford again claimed west London bragging rights at Stamford Bridge.
An unfortunate first-half own goal from returning captain Cesar Azpilicueta and a late breakaway effort from substitute Bryan Mbeumo sealed more derby success for the resolute Bees, who ended a six-match winless run to provide a boost to their previously fast-fading European hopes despite only having one shot on target all night.
