It was Arsenal, even with the hosts enjoying the lion's share of possession, who looked the more potent threat on the attack despite being unbeaten at home in nine games under the lights.
During the 32nd minute, an innocuous-looking challenge by Sadio Mané on Takehiro Tomiyasu sparked a wild protest by both benches, as Mikel Arteta and Jurgen Klopp were both issued yellow cards. Coaches' confrontation gave the Kop their voice and boosted the hosts' attacking effort.
A close-range Aaron Ramsdale save denied Mo Salah, then Ramsdale tipped over a Trent Alexander-Arnold left-footed strike. It wasn't until 38 minutes into the match when Alexander-Arnold hooked in a devilish free-kick from the right and Mané nodded in a deserved opener.
Arsenal had held three clean sheets in a row before this evening, but the game's continuous pace was too much for the 'Gunners,' as they conceded a second goal just seven minutes after the restart.
Nuno Tavares charged out of defense with no clear plan of attack and, for some reason, passed the ball to Diogo Jota, who skillfully simply walked past Ben White and Ramsdale before tapping into an empty net.
Arsenal's night was made even worse as Mané set up the third goal for the visitors. On 73 minutes, Jota provided a slick headed-through ball for the Senegalese striker, setting up Salah for a tap-in. When Alexander-Arnold arrived, the collapse was complete.
Following West Ham's stopping of their own unbeaten Premier League run last week, Liverpool responded by destroying Arsenal's unbeaten record and continuing their winning ways to close the gap on Chelsea to four points.