Substitute Kai Havertz scored a late winner as Chelsea came from behind to record a dramatic victory over West Ham, who had a 90th-minute Maxwel Cornet equaliser ruled out.
The Hammers frustrated Chelsea in a first half that saw plenty of home possession but no shots on target for either side, and looked to have executed their gameplan to perfection when Michail Antonio scored from a rare attack after 62 minutes.
The forward bundled in from close range after Blues goalkeeper Edouard Mendy failed to deal with a corner, but the visitors’ lead was wiped out 14 minutes later.
Chelsea, on the back of a record summer of spending and with £70m arrival Wesley Fofana making his debut, had struggled to break down David Moyes’ side before Ben Chilwell snuck in to level from a tight angle shortly after coming off the bench.
It sparked a frantic finish, with Cornet almost winning it late on for the visitors, only to see his header come back off the post and the Blues immediately score themselves through a clinical Havertz finish from Chilwell’s cross.
There was still time for more drama as Cornet pounced, but only after a foul on Mendy that was awarded once referee Andrew Madley consulted the pitchside monitor.
It gives Chelsea their third win of the season and lifts the Blues to fifth, while West Ham sit 18th.