Substitute Michy Batshuayi scored twice to give Chelsea a thrilling come-from-behind victory over Watford at Stamford Bridge.
Pedro's superb 12th-minute strike gave Chelsea the lead but Watford equalised just before half-time through Abdoulaye Doucoure.
Richarlison missed a great chance to put Watford ahead before he set up Roberto Pereyra, who finished well past Thibaut Courtois, only for Batshuayi, introduced on 61 minutes, to equalise 10 minutes later with a fine header into the top corner.
The home side took the lead with Cesar Azpilicueta's header three minutes from time before Batshuayi made sure of Chelsea's first win in three in stoppage time.
See: Chelsea report | Watford report