- Ben Chilwell (76')
- Kai Havertz (88')
- Michail Antonio (62')
The decision meant Thomas Tuchel's side secured a crucial victory after their indifferent start to the season, but West Ham boss David Moyes was furious with the disallowed goal.
"It is a scandalous decision, absolutely rotten from one of the supposedly elite referees," Moyes told the BBC.
"I support a lot of the VAR stuff, I actually think the goalkeeper dives, he is faking an injury because he cannot get to the next one -- he did the same on the first goal as well. The referee somehow gets that so wrong, it is incredible."
Tuchel said Chelsea got lucky with the decision but added that it was the correct one, saying that he wanted his side to build on the win.
"We take it now step by step, we will try to use this momentum," Tuchel said.
"Things are clear now, we can demand full commitment to everything. We are in the middle of creating this and it is not finished."
Tuchel handed a Chelsea debut to Wesley Fofana after the defender's move from Leicester City while Mason Mount and Havertz were among the players dropped from the starting lineup after the shock defeat to Southampton in midweek.
Both sides made a slow start and the first genuine chance came in the 27th minute when Christian Pulisic had a shot blocked by West Ham's new signing Lucas Paqueta after a cross from Reece James was cleared out to the United States international.
Marc Cucurella was forced into a block from a Bowen effort in the 57th minute and the West Ham forward tested Mendy with a volley in the 62nd minute -- the game's first shot on target.
Mendy flapped at the resulting corner after it was flicked on by Paqueta, allowing Declan Rice to square for Antonio to slot home from close range.
Chelsea hauled themselves back into the game in the 76th minute when Ben Chilwell took advantage of a moment of madness from Lukasz Fabianski, poking through the keeper's legs after he hesitated following the left-back's flick-on from a long ball.
Substitute Havertz latched on to a cross from Chilwell to complete Chelsea's comeback with two minutes left of normal time, before Cornet responded almost instantly -- but Chelsea had the last laugh.
Information from Reuters contributed to this report.
- Andy Madley
|Brighton & Hove Albion||15||7||4||4||+5||25|
|West Ham United||15||7||3||5||+1||24|