Chelsea on Sunday further extended their unbeaten run across all competitions to twelve matches after beating Tottenham Hotspur 3-nil.
The win was the Blues' sixth consecutive match without a defeat against their fellow London rivals but for Spurs, it was their second loss of the season and ironically, was against another London team and by the same scoreline.
Once play got underway, the clash developed at a frantic pace, although both sides were often one pass away from opening each other's defence.
Mason Mount and Andreas Christensen had good chances for the Chelsea, while Heung-Min Son almost found enough space to beat Kepa Arrizabalaga, but neither outfit deserved to go into the break in front.
For the first time under Thomas Tuchel, Chelsea failed to register a single shot on target during the first 45 minutes.
Less than 360 seconds after the interval, however, they had managed two, with the sublime Thiago Silva heading home Alonso's corner after Hugo Lloris had parried a volley from Alonso despite showing plenty of intensity in the first half.
Tottenham were now being blown away by their opponents, and it wasn't long before the visitors were two to the good.
Substitute N'Golo Kante's drive took a wicked deflection off Eric Dier on its way past Lloris via the post, but Tuchel's men deserved nothing less given their stunning improvement.
Much of the threats didn't come from the Lillywhites other than a Harry Kane effort that Arrizabalaga easily held, Chelsea saw the game out with ease, and added a third in stoppage time when Timo Werner's low cross was driven in by fellow countryman Antonio Rüdiger.
They now sit joint-top of the Premier League table with Liverpool and have won their last six away London derbies in the league for the first time.
Tottenham, meanwhile, are without a win in three outings, conceding eight during that run.
This article was most recently revised and updated 1 year ago