Chelsea booked their place in the FA Cup fourth round as four second-half goals took them past Championship side Preston at Stamford Bridge.
Armando Broja opened the scoring with a superb glancing header from Malo Gusto's left-wing cross just before the hour mark and Thiago Silva was left unmarked to head home from a corner eight minutes later.
A third goal in 11 minutes came when Raheem Sterling's dipping free-kick from 20 yards out beat a helpless Freddie Woodman in the Preston goal.
Enzo Fernandez added a fourth from close range late on following a check by the video assistant referee after he had initially been flagged offside.