It was far and away the most exciting and encouraging result of Unai Emery's tenure at Arsenal so far.
Amid the kind of febrile atmosphere expected in a north London derby, Tottenham were blown away by an Arsenal performance of manic intensity, breathless speed and tactical dexterity.
The result saw the Gunners leapfrog their neighbours into the Premier League top four, while extending their impressive unbeaten sequence in all competitions to 19 matches.
There's no question Emery's Arsenal are more resolute and harder-to-beat than the often brittle teams put out by Arsene Wenger.