The Gunners beat Spurs 1-0 away at the Tottenham Hotspur stadium in a display that will give Mikel Arteta and his players a massive boost in confidence as they go into a tough run of fixtures.
When the lineups came out at 12.45 pm, Tottenham looked stronger as they had most of their first-team players available and ready for selection. However, Arsenal had several key players out, which made their task a lot more difficult when going to hostile ground.
However, this didn't faze them as they came out and put on one of the best performances in the Arteta era and walked away with three huge points.
Here are four things Vavel learnt from the game:
Resilient defence proves too much
Arsenal, in 2024, have played 11 away games, winning 10 and drawing one game while keeping nine clean sheets.
This is down to the Gunners having one of the best defences in Europe.
Gabriel, who scored the winning goal today, and William Saliba are among the best duo defence partnerships that Arsenal has had in a long time.
For 90 minutes, they kept Spurs at bay, not allowing the front four of their rivals to create any significant chances that could test David Raya.
Ben White and Jurrien Timber also had excellent performances, helping the duo ensure they were too good for Tottenham.
Key players out in big game
Returning from the international break, the North London side were unlucky during the two weeks.
Captain Martin Ødegaard got an ankle injury in his last fixture with Norway, and this was a big loss for Arsenal due to the importance of the Norwegian.
After the game today, Arteta gave an update on Ødegaard's injury: "Martin, we still have to want and see. He wasn't available today."
Riccardo Calafiori also got injured for Italy, and this was a significant loss as he was starting to gain match fitness for the Gunners.
These injuries meant Arteta had to change up the lineup, and he started Thomas Partey and Jorginho in a double pivot in front of the defence.
The two midfielders had good games, but you could tell the difference between having them compared to Ødegaard and Declan Rice, who was suspended for the game.
Arsenal will have Rice coming back into the squad against Atalanta, but Ødegaard's injury is still in the air as the Gunners hope the Norwegian comes back into the team soon.
Ethan Nwaneri was a bright spark coming off the bench
Today, Arsenal's bench consisted of five academy prospects with huge potential.
However, Ethan Nwaneri was the only one who came off the bench, and when the 17-year-old did, you could tell he belonged on the team.
The England U19 international showed today why Arteta can trust him; whenever he got on the ball, he felt calm and knew what he was doing.
He is the youngest player to appear in the North London Derby in the League in more than 30 years.
He has a bright future at Arsenal and, in the next week, can get more opportunities with key players still injured.
Huge win going into a challenging period
At the start of the week, pundits and the media said this would be one of Arsenal's most brutal weeks of the season.
However, they just beat their biggest rivals in their backyard and gave them tremendous confidence.
They now go to Italy on Thursday to play Atalanta in the Champions League. This will be a tough fixture, but a fixture you expect the Gunners to win.
Then comes one of the biggest games of the season, with Arteta and the team travelling to Manchester to play Man City.