Jose Mourinho had a humbling night on Thursday as Thomas Tuchel matched his measure as Chelsea manager while handing out a historic defeat to the Tottenham boss.
Jorginho scored the only goal of the game from the penalty spot after Eric Dier recklessly fouled Timo Werner in the area.
The result took Chelsea up to sixth in the Premier League, three points clear of Spurs but having played a game more.
Spurs also lost their last home game when they were beaten 3-1 by Jurgen Klopp’s Liverpool.
Tottenham is in their worst run of league form since 2012; Jose Mourinho in his worst run of home league form, ever. Unexpectedly, Chelsea is no longer the capital’s crisis club.
It was the first time in Mourinho’s entire managerial career that he has suffered back-to-back home league defeats, an incredible run spanning 326 home league games at eight different clubs.
A third straight league defeat is their worst run since a similar stretch under Andre Villas-Boas between November 3 and 17, 2012.
Earlier in his career, Mourinho’s home record at Chelsea was without compare, as he started an 86-game unbeaten run at Stamford Bridge.
New Blues boss Tuchel has gotten his tenure off to a good start, with two wins and a draw from his first three matches. He has also become the first Chelsea manager since Mourinho in 2004 to keep a clean sheet in each of his first three league games.
It was a clean sheet which never looked like being tarnished, with Chelsea much the better side despite the narrow scoreline.
Edouard Mendy had little to do and saw Carlos Vinicius head narrowly wide late on from Tottenham’s best chance.
The game added to a miserable run for Mourinho against his former side. He hasn’t won any of his last seven games against Chelsea, drawing three and losing four.
It is his joint-longest winless run against any opponent in his managerial career, matching another run of seven games without a win against Barcelona between 2011 and 2012 while manager of Real Madrid.
And, no, Chelsea is not back in the title race. It would take more than a new manager to motivate with a little miracle.
But a place in the top four, Champions League football next season, that is very much on.
What is happening now will be making a lot of teams very worried. Tottenham, obviously; but Liverpool and maybe even Manchester United, too.
There are some things for which Mourinho can be blamed. That Tottenham was not positive enough in the first half; they allowed Chelsea to dominate play; that they have failed to come up with a proper battle-plan to cover up for the absence of Harry Kane.
All of this can be laid at the manager’s door, if so willing.