Chelsea condemned Tottenham to a third straight defeat as they got the better of their rivals in north London.
The two sides were only separated by goal difference ahead of the contest and both needed the three points to close on the top four.
Jorginho’s first-half penalty proved to be decisive and ensured Thomas Tuchel’s promising start to life continues.
Timo Werner was recklessly scythed down in the first-half which allowed the Italian to convert from 12 yards.
Tottenham, again without Harry Kane, offered little in the first-half as they lacked ideas.
A half-time talking to from Jose Mourinho inevitably resulted in more intent in the second 45, but the hosts could still only muster two attempts on target during the game.
Chelsea were able to play on the break and Hugo Lloris produced a smart save to deny Mason Mount.
Here are five talking points from Tuchel’s second win as Blues boss.
1. Tuchel’s tweaks
We’re now three games into the Tuchel era and already patterns are beginning to emerge regarding his thoughts on how to get the best from this Chelsea side.
In each game the former PSG boss has gone with a 3-4-3 system, similar to the one that Antonio Conte deployed.
Thiago Silva, Cesar Azpilicueta and Antonio Rudiger have started all three games as a defensive trio.
Kurt Zouma was a favourite under Frank Lampard but has been resigned to the bench.
Tuchel has also used Mateo Kovacic and Jorginho as his two midfield linchpins. The pair offering a nice balance in the middle of the park.
Callum Hudson-Odoi could also prove to be a big winner under Tuchel having started in a wing-back role throughout his three-game tenure.
2. No Kane – No Son
Mourinho said after the defeat at Brighton that Harry Kane’s absence meant more than losing a striker.
The forward is the heartbeat of this Tottenham side and their manager believes the players “feel it too much” when he isn’t present.
That is never more evident than when looking at Son.
He and Kane enjoy an electric partnership and have teamed up more impressively than ever this season.
The Englishman’s willingness to drop deep and play his partner in has reaped its rewards.
Without him though Son appears less enthused knowing that the killer pass is less likely to come.
3. Jose’s unwanted first
Throughout his managerial career Mourinho’s home record has always been a strength.
During almost nine seasons in charge of Chelsea, Inter Milan and Real Madrid Mourinho suffered just three home league defeats.
Now though he has seen a team lose successive home league matches following defeats to Liverpool and Chelsea.
The intimidation factor that once came with facing a Mourinho team on their own patch has most definitely gone.
Winning in north London is by no means a rarity, but for it to happen twice in a week adds to the frailty that is growing with Tottenham.
4. Operation Werner
Tuchel has wasted no time in trying to revive a Werner who is bereft of confidence and form.
But there are signs, albeit small ones, that the German is beginning to feel like his old self.
His manager is clearly under the impression that having Werner firing on all cylinders will make his life a lot easier.
The summer signing had an early header that showed ambition and won the penalty for the opener.
Tuchel’s reaction after Jorginho’s strike was telling though, rather than celebrate he immediately called Werner over to give him further instructions.
Of all Chelsea’s recent recruits it is Werner’s inability to produce that has hindered them.
Getting the best from Kai Havertz will be on Tuchel’s to-do list, but Werner looks the priority.
5. Mourinho meets Tuchel
Crazy to think that two men who have both been at the top of European football for the past five years haven’t crossed paths.
But when Tuchel and Mourinho shared a touchline they did so for the first time.
In recent jobs at PSG and Borussia Dortmund Tuchel has never come up against a Mourinho Manchester United or Tottenham side.
The clash wasn’t so much a meeting of minds, instead an example of how differing philosophies can lead you to the summit.
Tuchel’s possession-based game was able to breach Mourinho’s conservative approach.
The German is certainly a new-age coach, but the Portuguese boss no doubt still has a trophy or two in him.