Sadio Mane, Andy Robertson and Diogo Jota, on his home debut, all scored after Alexandre Lacazette had been gifted the opener after a Robertson error.
If the France international’s finish from Arsenal’s first shot on target in the 25th minute was not that convincing his performance in two second-half one-on-ones – one latterly flagged offside – with Alisson Becker was even less so and his misses will have left Mikael Arteta wondering what night have been on a wet Monday night in Anfield.
Liverpool dominated however and had 21 shots on goal compated to their opponents 4 and in truth looked very comfortable beofre Diogo Jota marked his debut with a late goal on the 88th minute.
Arsenal, with David Luiz restored to a back three and two holding midfielders in Mohamed Elneny and Granit Xhaka, seemed in no mood to take the game to their hosts as Premier League newcomers Leeds had so thrillingly done on the opening weekend of the season.
Instead they sat back, rarely engaging as Liverpool played out from the defence, in the hope of hitting on the break.
There was a touch of fortune rather than thought about the Gunners opener with a Pierre-Emerick Aubameyang’s over-hit cross mis-controlled by Andy Roberson into the path of Lacazette.
The France international also mis-kicked his shot but he succeeded in bouncing it into the floor and agonisingly over the outstretched arm of Alisson.
However, if Arteta was hoping to hold on to that lead his plan was dashed after 147 seconds as Leno parried Mohamed Salah’s shot and Mane pounced for the equaliser.
Seven minutes later Liverpool were ahead as yet another Alexander-Arnold cross found its target in the penalty area, this time his opposite full-back Robertson making amends for his earlier error by controlling on his chest and poking home.
The final word was left to Liverpool’s new signing Jota, on as a late substitute, who finally put the match to bed two minutes from time when he seized a weak David Luiz header, controlling and firing low into the Kop net having earlier wasted a better chance with only Leno to beat.
Liverpool are now joint top of the League with Leicester and Everton with the final score at Anfield Liverpool 3 – Arsenal 1.