Defeat for Spurs leaves them 4pts behind Chelsea
Blues can win Premier League title next Friday
Lanzini swiped in from close range in the second half
Live reaction on BBC Radio 5 live
West Ham 1-0 Tottenham
Jermaine Jenas
Former England midfielder on BBC Radio 5 live
The changes make sense. Harry Kane has not had a sniff but now with Kane and Vincent Janssen in the higher position it gives West Ham something to think about.
Spurs striker Vincent Janssen replaces midfielder Victor Wanyama.
Janssen has only managed two league goals all season. Time to be a hero?
Ben Davies' cross is held by Adrian, who goes to ground with the ball. Suddenly West Ham are taking their time with everything.
West Ham defender Sam Byram is the fourth Hammers player booked, for pulling back a Spurs man. Manuel Lanzini was booked for his celebrations a few minutes ago.
Manuel Lanzini fires one over for West Ham. As things stand they are mathematically safe, as compared to 99.99% safe.
Mark Noble now misses the target with an effort of his own.
West Ham have dropped a league-high 22 points from winning positions. Hope for Spurs?
West Ham 1-0 Tottenham
Jermaine Jenas
Former England midfielder on BBC Radio 5 live
The faces of the Spurs players look shocked, they look stunned. They look worried. They have to pull out something in the next 25 minutes.
Image source, Reuters#bbcfootball or text 81111
Femi John Atoyebi: BODY BLOW to Spurs! A goal celebrated throughout London!
Kwasi Boafo Manu: Come on West Ham, we can do this. From a true blue.
Spurs boss Mauricio Pochettino makes an immediate change, defender Jan Vertonghen coming off to be replaced by midfielder Mousa Dembele.
West Ham 1-0 Tottenham
Jermaine Jenas
Former England midfielder on BBC Radio 5 live
West Ham have deserved it. They get a lot of bodies forward and Spurs are all over the place. Lanzini could not miss.
It has been a sloppy, lethargic Spurs display all night. If they needed something to wake them up then it was that.
West Ham lead, and is this is the end of Spurs' title dreams?
Aaron Cresswell's cross isn't dealt with, Andre Ayew tries to control the ball under pressure but it squirms its way to Manuel Lanzini, who smashes home from six yards out.
Spurs' players look shell-shocked.
Image source, ReutersManuel Lanzini
Goal for Chelsea, sorry West Ham.
West Ham 0-0 Tottenham
Jermaine Jenas
Former England midfielder on BBC Radio 5 live
That is the first time Spurs have managed to get behind West Ham's midfield. It is a decent strike from Son but I think he has taken the wrong option. He has got to slide in Kyle Walker who can then square it to somebody.
Son Heung-min charges at the Hammers defence and fires one in from just inside the area but Adrian dives to palm it around the post.
Is it time for Spurs to start panicking?
#bbcfootball
Kevin Samuelson: As a neutral, I'd love to see Spurs win, I want the title decided with another "Aguerrooooo" moment.
Victor Mooooooooooooooooosssssseeeeeessss?
West Ham 0-0 Tottenham
BBC Sport presenter Manish Bhasin hopes we might see a moment of brilliance...
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A decent chance for Spurs here as Son Heung-min pulls the ball back to Christian Eriksen, who basically passes the ball to West Ham keeper Adrian.
Image source, Rex FeaturesAll the debate on #bbcfootball and 81111 is about super-computers and statistics. The football traditionalists will be fuming.
West Ham 0-0 Tottenham
West Ham were hoping Andy Carroll would be fit enough tonight to be their focal point up-front, instead they have Jonathan Calleri leading the line.
However, the on-loan Argentine has had a minimal impact - as you can see from his touch-map graphic.
The 23-year-old has managed just 16 touches in the opening 55 minutes, with just one coming inside the Spurs area.
Image source, OptaChance for West Ham to break but Jonathan Calleri totally over-hits a through-ball to Andre Ayew. The Hammers could have been in there. Calleri's passing accuracy today is at 36%.
Image source, AFP