Virgil van Dijk and Alisson Becker errors gifted Arsenal a 2-1 victory as Liverpool's hopes of breaking the Premier League points record were dashed
Sadio Mane looked to have set the champions on course for one of the three victories they needed to surpass Manchester City's record 100-point haul with the opener on 20 minutes at the Emirates
But the bedrocks of Liverpool's title triumph handed Arsenal a half-time lead, as rare Van Dijk and Alisson mistakes were ruthlessly punished by Alexandre Lacazette and Reiss Nelson's first Premier League goal
And, despite a commanding second-half performance, Liverpool were unable to prevent a third defeat of the season as Arsenal climbed to ninth after their first victory over Jurgen Klopp's side in five years
A near full-strength Liverpool were dominant from the outset and were nearly gifted the opening goal on 13 minutes when Roberto Firmino charged down goalkeeper Emiliano Martinez's lethargic clearance, sending the ball cannoning off the base of the post
It was only a matter of time before the champions converted their dominance, as Mane rounded off a flowing attack with a simple finish from Andrew Robertson's pin-point cross on 20 minutes
It looked to be business as usual for Liverpool as they stifled Arsenal, but then two pillars of their Premier League title-winning season conspired to gift the Gunners the lead out of nowhere
The usually flawless Van Dijk succumbed to Nelson's high press, relinquishing possession to Lacazette, who rounded Alisson and stroked the equaliser into the empty net
It was Van Dijk's first error that led to a goal in the Premier League since March 2019, and things soon took a turn for the worse for the champions as goalkeeper Alisson's loose pass was intercepted by Lacazette, who squared to Nelson to rifle his first league goal for the Gunners
Liverpool re-emerged from the break on top and determined to right the wrongs on the first period, and nearly drew level on 54 minutes when Mohamed Salah drew a fingertip save from Martinez
The introduction of Takumi Minamino energised the Liverpool attack but he shanked a shot wide before Salah planted a header straight into the arms of Martinez, as desperation crept in as the seconds ebbed away
Substitute Ainsley Maitland-Niles did just enough to put Mane off from hauling Liverpool level as he fired wide at the near post with two minutes remaining, moments before Joe Willock missed the chance to seal the Arsenal victory with a wild sliced shot from Pierre-Emerick Aubameyang's centre
The final throw of the Liverpool dice saw Trent Alexander-Arnold's deflected drive draw a stunning save from Martinez at full stretch in the fifth minute of stoppage time, but the Gunners stood firm to warm up for Saturday's FA Cup semi-final with Manchester City in style
Liverpool defender  told : "We gave them goals as a present
 We dominated and put pressure on them but gave them two goals and obviously then it's difficult to come back
 If you give goals away like we did today, including myself, you get what you deserve
"The goals shouldn't happen, but until then nothing was wrong
 We pressed them and scored a fantastic goal
 A moment of concentration [cost us] and that was unfortunately something we had to deal with twice
 It's so easy to blame us having won the title
"I had a feeling we could win here comfortably, but if you give them goals you see what happens
 I made a mistake, I take the blame for it, I take it as a man, and we move on
"Arsenal head coach : ""In terms of energy and happiness before a semi-final, it was the best medicine
 We had a bit of luck, but the belief was good
 Before, going behind, I think we could have gone down, but we reacted
"You only need to look at the difference between the two teams, the gap is enormous
 But the energy, commitment and fight between the two teams is equal - and the rest will come
 It will take time, but we can create something
"We need to build and improve the squad; it is not magic
 You need a bigger squad to compete in this competition and that is going to be the challenge
"Liverpool manager : "We took a break at 1-0
 Twice a massive lack of concentration and these two moments killed the game for us
 Arsenal had no real chances, but you cannot win football games when you concede goals like this
"We took a break, that's clear, lost concentration, it's the Premier League and you cannot do that
 Virgil van Dijk lost the ball, but I didn't see a lot of offers
 Nobody wanted the ball
 It makes no sense
"We have to learn from that 100%, and we will
 I am not sure we never did it all season, we had sloppy moments, once, twice, maybe three times but tonight we got punished from it
 It's good on one side because we have to learn from it
"The Gunners captain for the night produced a crucial performance as an opportunistic goal and assist saw teh Frenchman's direct goal involvement against Liverpool increase to four goals in three Premier League appearances against Liverpool at the Emirates Stadium (two goals and two assists)
Arsenal take on Manchester City in the FA Cup semi-finals on Saturday at 7
45pm, travel to Aston Villa on July 21 at 8
15pm and complete their Premier League season at home to Watford at 4pm on July 26
, before completing their title-winning season with a final-day assignment at Newcastle at 4pm on July 26
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