Chelsea’s opening setback came when Penders punched the ball into his own net. An own goal can change the rhythm of a derby, and Tottenham were able to protect their advantage rather than chase the match from behind.
Palmer’s dismissal then created a second major obstacle. The Chelsea playmaker had reportedly escaped a straight red earlier before receiving a second yellow card, reducing the hosts to 10 men and making a comeback considerably harder.
The scoreline therefore reflected more than Tottenham’s attacking quality. Chelsea were punished by a goalkeeping error and lost one of their most influential players before the final whistle.
Mathys Tel’s solo effort provided the clearest piece of individual quality in the game. With Tottenham already benefiting from Chelsea’s numerical disadvantage, the forward’s finish turned a narrow lead into a 2-0 result.
That goal also gave De Zerbi’s team a stronger platform to manage the closing stages. Rather than relying solely on the own goal, Spurs added an attacking highlight that underlined their threat in transition and one-on-one situations.
For Chelsea, the defeat will be judged through the combination of the own goal and Palmer’s red card. Both incidents carried more weight than a routine tactical loss.
Tottenham can build on a rare Stamford Bridge success, but the next test will be avoiding a drop in intensity after a high-profile derby win. Chelsea’s response will be equally important, particularly with Palmer’s availability now a central issue.
The next fixtures should reveal whether this was a one-off swing in a chaotic match or the start of a more convincing Tottenham revival under De Zerbi.