Branislav Ivanovic scored on what might be his farewell appearance as Chelsea brushed neighbours Brentford aside 4-0 in their west London clash.
Brentford, 15th in the Championship, took Chelsea to a replay four years ago, but there was little prospect of a repeat at Stamford Bridge as the Blues claimed a tenth successive home win.
Willian, Pedro and Michy Batshuayi, with a penalty, were also on target for the Premier League leaders, whose only concern came when Willian went off midway through the second half after earlier holding his ankle.
Ivanovic replaced Willian and scored his 34th Chelsea goal on his 377th appearance, amid suggestions his nine-year stay at Stamford Bridge could come to an end before Tuesday's transfer deadline.
Asmir Begovic, who will be allowed to leave for Bournemouth if Chelsea can find a replacement, made a number of key interventions to deny Brentford and show his value as Thibaut Courtois' back-up.
Another potential goodbye came when striker Scott Hogan, valued at £15million and linked with West Ham, came off the Brentford bench.
It was his first involvement in the matchday squad for almost four weeks but he could not turn the match in Brentford's favour.