Match ends, West Ham United 1, Chelsea 2.
West Ham United 1-2 Chelsea
Diego Costa and Eden Hazard scored as Chelsea beat West Ham to extend their lead at the top of the Premier League to 10 points.
It was the Blues' 21st victory of the league season and another big step towards winning the title in Antonio Conte's first season as manager.
The Italian was once again spot on with his tactics - nullifying the predictable aerial threat of the Hammers' 6ft 4in frontman Andy Carroll early in the match.
And then in the 25th minute his attackers cruelly exposed the hosts' defence with a devastating counter-attack.
N'Golo Kante read a pass from Robert Snodgrass deep inside the Chelsea half on the left and played the ball to Hazard. The Belgium winger drove forward, played a one-two with Pedro and then shifted the ball past keeper Darren Randolph before slotting home.
The Blues doubled their lead after the break when Hazard's corner from the left was turned in with his thigh by Costa - the Spain striker's 17th league goal of the season.
The Hammers came close after Costa's strike when Sofiane Feghouli's low drive was brilliantly saved by Thibaut Courtois. Chelsea wing-back Marcos Alonso then appeared to block Manuel Lanzini's half-volley with his arm moments later - but referee Andre Marriner deemed it to be accidental.
West Ham finally pierced the last line of defence in stoppage time. Carroll robbed Cesc Fabregas and fed Andre Ayew, who squared for Lanzini to fire in.
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Chelsea quell Carroll threat
No doubt there were West Ham supporters who would have fancied their team's chances of causing an upset on Monday.
They came into the match having lost only one of their past six league games, picking up three wins. And one of the Blues' four defeats came at London Stadium in the EFL Cup earlier this season.
But perhaps what gave those fans greatest belief of a win was the return of Carroll, back after a month out with a groin injury - and the big striker was central to the Hammers' tactics.
In the opening 20 minutes, both Snodgrass and Feghouli provided the ex-Newcastle and Liverpool forward with high lofted balls. Unfortunately for Hammers manager Slaven Bilic, Chelsea had done their homework as their defenders repeatedly prevented Carroll from having an effort on goal.
He became a peripheral figure in the second half as West Ham looked for a new way of breaching the visitors' defence.
They managed to do so through Lanzini in the dying seconds, but there was too little time to find an equaliser.
Unflappable Blues continue march to title
Not even an intruder who made his way towards the Chelsea players after Hazard's goal could nudge the visitors off their stride. He, like West Ham's attack, was quickly contained.
Chelsea's attack then demonstrated why they are top of the table - the opening goal was a delight.
Kante, who as a defensive midfielder made the second-highest number of sprints on the night - 77 - darted back to cut out Snodgrass' ball. It was then over to Hazard and Pedro, with the Belgian having the confidence and composure to take the ball past Randolph before tucking in.
It was not as good as his Match of the Day goal of the month against Arsenal on 4 February, but impressive nonetheless. Costa, who had a quiet game, then added a simple second after the break.
The Blues did lose their concentration on two occasions: once when Courtois made a great save to block Feghouli's low drive, and then in stoppage time when the Belgium keeper was beaten by Lanzini.
But those mistakes have been few and far between this season.
Man of the match - Eden Hazard (Chelsea)
Chelsea hit route 66 - the stats
- Chelsea have enjoyed 118 Premier League London derby wins, more than any other side (one more than Arsenal).
- West Ham have won only two of their past 22 Premier League clashes with Chelsea, losing 16 and drawing four.
- Chelsea are the seventh side to accrue 66-plus points from their first 27 games of a Premier League season, having done it themselves twice before (69 in 2005-06 and 68 in 2004-05). All six previous sides have gone on to win the title.
- Chelsea scored the opening goal of the game for the 21st time this season in the Premier League, four more times than any other side.
- Chelsea are the only side to use all three substitutes in all of their Premier League games this season.
- Lanzini has scored in eight of his 12 Premier League London derby appearances.
Chelsea have an FA Cup quarter-final against Manchester United coming up on Monday, 13 March (19:45 GMT) and then it is back to league action the following Saturday when they travel to Stoke.
West Ham are away at Bournemouth in the Premier League on Saturday, 11 March (15:00 GMT).
- 2ReidSubstituted forByramat 64'minutes
- 16NobleSubstituted forFernandesat 77'minutes
- 7FeghouliSubstituted forAyewat 64'minutes
- 30David Luiz
- 15MosesSubstituted forZoumaat 76'minutes
- 4FàbregasBooked at 45mins
- 11PedroSubstituted forMaticat 65'minutes
- 19Diego Costa
- 10HazardSubstituted forWillianat 75'minutes
- Andre Marriner
- Shots on Target
Second Half ends, West Ham United 1, Chelsea 2.
Goal! West Ham United 1, Chelsea 2. Manuel Lanzini (West Ham United) right footed shot from the centre of the box to the bottom left corner. Assisted by André Ayew.
Foul by Sam Byram (West Ham United).
Marcos Alonso (Chelsea) wins a free kick in the defensive half.
Offside, Chelsea. Kurt Zouma tries a through ball, but Diego Costa is caught offside.
Corner, Chelsea. Conceded by Aaron Cresswell.
Attempt blocked. Willian (Chelsea) right footed shot from the right side of the box is blocked. Assisted by César Azpilicueta.
Attempt missed. Cesc Fàbregas (Chelsea) right footed shot from the centre of the box is too high. Assisted by Willian.
Foul by Edimilson Fernandes (West Ham United).
Cesc Fàbregas (Chelsea) wins a free kick in the defensive half.
Cheikhou Kouyaté (West Ham United) wins a free kick in the defensive half.
Foul by Diego Costa (Chelsea).
Substitution, West Ham United. Edimilson Fernandes replaces Mark Noble.
Substitution, Chelsea. Kurt Zouma replaces Victor Moses.
Substitution, Chelsea. Willian replaces Eden Hazard.
Corner, West Ham United. Conceded by Victor Moses.
Attempt missed. Pedro Obiang (West Ham United) right footed shot from outside the box misses to the right. Assisted by Robert Snodgrass.
Pedro Obiang (West Ham United) wins a free kick in the attacking half.
Foul by Nemanja Matic (Chelsea).
Attempt missed. Andy Carroll (West Ham United) header from the centre of the box is close, but misses to the left. Assisted by Mark Noble.
Pedro Obiang (West Ham United) wins a free kick in the defensive half.
Foul by Cesc Fàbregas (Chelsea).
Attempt missed. César Azpilicueta (Chelsea) left footed shot from outside the box misses to the right following a corner.
Corner, Chelsea. Conceded by Darren Randolph.
Attempt saved. Diego Costa (Chelsea) left footed shot from the centre of the box is saved in the bottom left corner. Assisted by Eden Hazard.
Substitution, Chelsea. Nemanja Matic replaces Pedro.
Substitution, West Ham United. Sam Byram replaces Winston Reid because of an injury.
Substitution, West Ham United. André Ayew replaces Sofiane Feghouli.
Attempt missed. José Fonte (West Ham United) header from the centre of the box is just a bit too high. Assisted by Robert Snodgrass with a headed pass following a corner.
Attempt blocked. Mark Noble (West Ham United) right footed shot from outside the box is blocked.
Attempt blocked. Sofiane Feghouli (West Ham United) right footed shot from the centre of the box is blocked. Assisted by José Fonte.
Corner, West Ham United. Conceded by César Azpilicueta.
Foul by David Luiz (Chelsea).
Andy Carroll (West Ham United) wins a free kick in the attacking half.
Attempt missed. Andy Carroll (West Ham United) left footed shot from outside the box is close, but misses the top left corner.
Attempt missed. Marcos Alonso (Chelsea) left footed shot from the centre of the box is close, but misses to the right. Assisted by Eden Hazard.
Attempt missed. Manuel Lanzini (West Ham United) right footed shot from outside the box misses to the right.
Goal! West Ham United 0, Chelsea 2. Diego Costa (Chelsea) right footed shot from very close range to the centre of the goal following a corner.
Corner, Chelsea. Conceded by Cheikhou Kouyaté.