A remarkable ending to the game at Stamford Bridge saw Chelsea snatch a much needed 2-1 win against West Ham.
Following a disappointing first half from both teams, Michail Antonio's 62nd minute opener was the moment which that burst the game into life.
After the visitors took an unexpected lead, the introduction of Ben Chilwell led to the The Blues getting an equaliser in the 76th minute, as they went on to look for a London derby win.
The drama of the last few minutes began with Maxwel Cornet's header hitting the post, as he looked certain to give The Hammers a win.
Immediately, Kai Havertz snatched a winner, with Chilwell adding to his goal with an assist for his fellow substitute. The drama didn't end there, the aforementioned Cornet's added time equaliser was controversially disallowed for a slight touch by Jarrod Bowen on Edouard Mendy, prior to the effort on goal.
The aftermath of a breathtaking finale means that Chelsea reach the 10 point mark and sit in fifth position in the league, for the time being.
A frustrating end to the game leaves West Ham on just four points from their first six fixtures.
Story of the Match
Following their midweek defeat at Southampton, the hosts made five changes to their starting lineup. One of them, Wesley Fofana, was set to make his Chelsea debut, after his move to the capital from Leicester City.
The other Chelsea changes from their trip to St. Mary's were Reece James, Mateo Kovacic, Conor Gallagher and Christian Pulisic coming into the team. They also reverted to their more familiar three centre back system.
West Ham were slightly more reserved with their team changes, after a credible draw against Tottenham on Wednesday night. Former Chelsea player, Emerson Palmieiri, replaced Aaron Cresswell at left back and after his 24-minute cameo on Wednesday night, Lucas Paqueta made his first start for the visitors. The Brazilian midfielder replaced Said Benrahma in David Moyes' team.
With the addition of Fofana, Chelsea's back three of him, partnered by the experience of Thiago Silva and Kalidou Koulibaly, looks a very strong one. Fofana and Silva both did well to outmuscle Michail Antonio, on separate occasions, in the first few minutes of the game.
Ruben Loftus-Cheek started his fifth Premier League game in a row, for the first time in his career. His rough, sliding challenge on Tomas Soucek, which earned the midfielder a yellow card, was probably the highlight of a quiet opening ten minutes.
Chelsea's 70% possession was a sign of their control during the first quarter of an hour. A well-drilled West Ham defence was making it difficult for The Blues to create any real openings, with Raheem Sterling having to resort to a mazy, solo run, to earn a corner for the hosts.
As we passed the halfway point of the first period, West Ham looked unlikely to add to their two goals so far this season - their lowest total, after their first five Premier League games, since 1994. Nonetheless, they would have been the happier of the two teams, as the hosts struggled to break them down.
A goal-side scramble, after James' powerful, low cross, presented a half-chance for Gallagher. His effort from inside of the box was blocked by one of the many West Ham bodies ahead of him.
Just the two shots from Chelsea before the half-hour mark - two more than West Ham managed, with none of the host's efforts being on target. This summed up what was a pretty difficult watch.
A major opening for Chelsea was created by Sterling - one of the few bright spots of the game, who's faint through ball to Pulisic almost provided a chance for the hosts, meters away from the visitor's goal. Vladimir Coufal was able to clear the ball, just before the American could get his second touch of the ball.
Declan Rice is often the standout player for West Ham. His two sliding tackles, coming after a good bit of attacking play down the left wing, were some examples of another decent performance from the England international.
The visitors had their best moment of the half in the 39th minute. After working their way into Chelsea's box, a second ball fell to Pablo Fornals. The Spaniard's volley seemed to be looping over Edouard Mendy, towards the goal, but it ended up wide off the mark.
A clash of heads between Tomas Soucek and Ruben Loftus-Cheek, in the West Ham box, was the last action of a subdued first half in this London derby.
The two keepers headed back into the changing rooms, without having a save to make.
Jarrod Bowen's darting run and a strong bit of play from Antonio within the first two minutes of the restart represented a surprisingly lively start for West Ham. Fofana responded for the hosts with a fairly poor and unprepared strike from outside of the box.
Back-to-back ball losses from Sterling and Paqueta led to Kurt Zouma blocking what could have been a dangerous cross into the West Ham box, after the visitors were caught very slightly out of their robust shape. The big centre back also got important touches with his head on a cross from a Gallagher free-kick and the subsequent corner, a minute later.
The visitors continued to show some signs of life. A ball played across to the middle of the Chelsea half from Rice found Bowen in a bit of space. His eventual long-range effort was blocked by Marc Cucurella.
Thomas Tuchel looked towards Armando Broja and Mason Mount for a much-needed opening goal. They came on to replace Pulisic and Gallagher at the 60 minute mark.
However, just a minute after, it was the visitors who sent the Stamford Bridge away end into ruptures. Pure chaos in the Chelsea box after a West Ham corner. The ball ended up looping towards the back post after the hosts failed to deal with the initial cross, where Declan Rice fizzed a ball across the goal-line, which was just about bundled across that line by Antonio.
It was Antonio's first league goal of the season - a scrappy goal, fitting of the first hour of the game. West Ham's livelier look in the second half meant that it would be slightly harsh to say that they didn't deserve to go ahead.
The host's immediate concern went from searching for the winner, to the equaliser of the game. Some neat, intricate play from Chelsea allowed Loftus-Cheek to find his way into the box. However, the visitors did just enough to repel the looming danger of his pass across the box, thanks to Coufal's clearance.
Further changes from Tuchel, as Kai Havertz and Ben Chilwell were introduced. Moyes, who was under 20 minutes away from his first league win at Stamford Bridge, on his 18th visit, introduced Benrahma to take Antonio's place.
Zouma, again, making a crucial intervention in the 75th minute, who was able to make a clearance before Havertz could get to the ball, ahead of him and Fabianski.
Moments after, Tuchel's change paid dividends, as the freshly introduced Chilwell - making his way forward, down the left side, was at the end of a long pass from Silva. A fortunate touch off the back of his head, as he turned away from the ball while going up for the headed challenge, fell kindly into his path for the wing back to squeeze through both the oncoming Fabianski and the near post. From Chilwell's effort, from a very tight angle, the ball trickled past the goal line and Chelsea were alive, again.
From that point on, it seemed the hosts were going to be the more likely team to grab a winner in the last quarter of an hour. On 83 minutes, Paqueta was replaced by Angelo Ogbonna, as West Ham transitioned to a back five in their efforts try and see out the game and earn a point.
An incredible ending to the game was set off in the 87th minute. Benrahma produced a perfect cross from the left side, towards the freshly introduced Maxwel Cornet. His header, from point-blank range, struck the post and a massive chance to go back ahead was wasted.
From looking certain to conceding a late winner, Chelsea went on to go up the other end and score one themselves. Chilwell, again was involved down the left hand side of the West Ham box. This time, with his low cross, he was the provider for Kai Havertz. The German managed to get himself ahead of Ogbonna and get a touch diverting the ball towards the goal, it was a shot which Fabianski was unable to keep out.
It seemed as if that was more than enough for derby day drama. West Ham would have felt hard done by, to concede a gutting winner, after being inches away from being the ones celebrating themselves.
Remarkably, The Hammers did end up, temporarily, being the ones celebrating. Cornet seemed to have redeemed himself and leave the visitors with a point, after his right foot strike hit the roof of the net, shortly after the clock ticked into added time.
However, Cornet's goal came just after Bowen made contact with Mendy. The Chelsea keeper was first onto the ball, prior to the two colliding. A faint touch from the winger left Mendy, remarkably, rolling on the ground, in agony for a few minutes. VAR intervened to disallow the goal, as Bowen's contact with Mendy's chest was adjudged to have impeded him from playing a part in preventing Cornet's impending effort.
Following one of the most remarkable five minutes in Premier League history, Chelsea ended up completing a scrappy 2-1 win. West Ham will rightfully feel hard done by, given their improved second half performance, by the way the end of the game went.
Player of the match - Thiago Silva
It would be tempting to give this title to Ben Chilwell. His introduction in the 72nd minute led to him scoring the equaliser and assisting the winner.
However, the 90 minute performance of Thiago Silva deserves highlighting.
The experienced Brazilian centre back is a composed presence within the Chelsea backline. His physicality was tested during his battle with Michail Antonio - a test with the 37-year-old passed, impressively.
He won six of his seven ground duels, maintained a 93% pass completion rate and assisted Chilwell's equaliser. A man who comfortably looks 15 years younger than his age.