Goals from James Maddison and Wilfred Ndidi sent Leicester top of the Premier League as they beat Chelsea 2-0 to pile the pressure on Blues boss Frank Lampard.
Chelsea were themselves seen as title contenders little over a month ago, but now find themselves eighth, having lost five of their last eight league games.
Saturday’s 1-0 win over 10-man Fulham had done little to increase optimism and Lampard made four changes to the side that had started that game, with Reece James, Tammy Abraham, Kai Havertz and Callum Hudson-Odoi drafted in.
However, his side were outplayed from the outset by Brendan Rodgers’ exciting team, who went ahead after just six minutes as a short corner routine ended with Ndidi thrashing home a superb strike off the inside of the post.
James Maddison had already struck the bar with a longe-range effort before some woeful defending from Antonio Rudiger left him free to slot home a second.
Prior to that, the visitors had looked set to get a chance to equalise from the spot, only for VAR to rule that Jonny Evans’ foul on Christian Pulisic had taken place outside the box.
Chelsea improved marginally after the break but Leicester were the more prominent threat and still had the game’s best chances, James Justin heading just wide, while Edouard Mendy made a smart stop with his feet to deny Youri Tielemans.
Substitute Timo Werner thought he had given Chelsea late hope when guiding in from Hakim Ziyech’s free-kick but the effort was ruled out for offside.
The Foxes’ win sends them a point ahead of Manchester United at the top of the Premier League having played a game more, while third-placed Manchester City have two games in hand and can go top, at least temporarily, by beating Aston Villa on Wednesday before United face Fulham later the same evening.