Chelsea were fortunate to beat West Ham after a late VAR call overturned Maxwell Cornet's 90th-minute equaliser. The Ivorian substitute had already hit the post with a header moments before Kai Havertz's eventual match winner and had his last-minute strike cancelled out.
The Hammers had gone ahead earlier in the second half, capitalising on Edouard Mendy's mistake at a set-piece, but were pegged back by Ben Chilwell's improvised finish before Havertz volleyed in.
The Blues were nearly denied a win, though, after a massive defensive miscommunication allowed Jarred Bowen to intercept Reece James' weak-headed pass back. Mendy was caught in two minds over whether to gather the ball or not and parried it straight to Cornet to score.
