Martin Odegaard scored twice to lead Arsenal to a dominant 3-1 victory over Chelsea on Tuesday and pushed the Gunners back to the top of the Premier League table.
The win marks Arsenal's first victory in five games after they suffered a humiliating 4-1 loss to Manchester City last week.
Noni Madueke scored a consolation goal for Chelsea in the second half, but it did little to distract from their woeful performance.
Arsenal are now two points clear of second-placed Manchester City, who still have two games in hand, and while City remain the favourites to win the title, Arsenal have at least applied some pressure to the champions.
The loss against Arsenal marks Chelsea's sixth straight defeat in all competitions since Frank Lampard returned as caretaker boss to replace the sacked Graham Potter.
The Blues are now on a nine-game winless run and face the prospect of failing to finish in the top half of the table for the first time since 1996.