London derby went the Hammers way and Chelsea can extend their lead on Monday
Tottenham's Premier League title aspirations have suffered a significant blow after they slumped 1-0 at West Ham.
Spurs went into Friday night's game at London Stadium, four points behind league leaders Chelsea and had a chance to reduce the gap to just a single point before Antonio Conte's side face Middlesbrough on Monday.
But the opportunity slipped away and Chelsea have a chance to extend their lead to seven points with three games to go of the season.
West Ham's victory also means they are now mathematically safe from relegation.
Not our night. pic.twitter.com/fGbLdYAELJ— Tottenham Hotspur (@SpursOfficial) May 5, 2017
Tottenham did not hit the heights of recent performances in East London and the West Ham winner came when a loose ball was pounced upon by Manuel Lanzini on 65 minutes.
The attacking midfielder lashed in from close range to put the Hammers into a lead that they would not relinquish as the pressure eased on West Ham manager Slaven Bilic who had been under some scrutiny after a difficult season for a club trying to become accustomed to new home surroundings.