Aston Villa hit seven goals past champions Liverpool as they emphatically made it three wins from three in the Premier League with a stunning 7-2 victory at Villa Park.
Ollie Watkins' perfect hat-trick and John McGinn's deflected volley left Jurgen Klopp and his side, who scored through Mohamed Salah's 100th goal in English football, stunned and 4-1 down at the break, and it could have been more had Ross Barkley converted any of his three golden opportunities.
Dean Smith's side continued to cut through a shell-shocked Liverpool in the second half as deflected goals from Barkley and Jack Grealish further extended their lead.
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Klopp's side did net another goal, again from Salah, but it was the hosts who completed the scoring, on what was a magical evening, as captain Grealish added a seventh.
It is the first time Liverpool, who produced "one of the worst defensive performances I've ever seen!", according to Sky Sports' Jamie Carragher, have conceded seven goals since a 7-2 league defeat at Tottenham in April 1963. They are down to fifth after their own perfect start to the season was ended in remarkable fashion.
Meanwhile, Villa, who have a game in hand, are up to second in the table on goal difference as we move into the international break.
Martinez (7), Konsa (7), Mings (7), Cash (7), Targett (7), Luiz (7), Barkley (8). McGinn (8), Trezeguet (7), Grealish (9), Watkins (9)
Subs used: Elmohamady (6), Nakamba (6), Traore (N/A)
Liverpool: Adrian (3), Van Dijk (4), Gomez (4), Robertson (4), Alexander-Arnold (4), Keita (4), Fabinho (5), Wijnaldum (4), Jota (5), Firmino (6), Salah (7)
Subs used: Minamino (4), Jones (5), Milner (4)
Man of the match: Ollie Watkins
How Villa embarrassed the champions
Villa took the lead in the fourth minute and they never looked back.
Grealish pounced upon Adrian's poor pass before squaring to Watkins, who had a simple finish for his first Premier League goal.
He did not have to wait too long for his second and it was one to remember as the club-record signing cut inside Joe Gomez and fired a right-footed shot past Adrian into the top corner.
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It could have been even worse for Liverpool as Villa continued to cut them to shreds, exploiting their high defensive line, but Barkley missed two glorious chances with the goal at his mercy.
Liverpool did eventually pull a goal back through Salah's exquisite 33rd-minute finish, but the expected comeback from the champions never materialised.
Smith's side continued to take the game to Liverpool, and they restored their two-goal advantage when McGinn's volley went in via deflection off Virgil van Dijk.
And then Watkins remarkably completed a perfect first half hat-trick, heading home from Trezeguet's cross to make it 4-1 at the break.
- Aston Villa’s XI featured one adjustment from their 3-0 victory at Fulham, with former Everton man Ross Barkley being handed a Villa bow following his arrival on loan from Chelsea and Conor Hourihane dropping to the bench.
- Goalkeeper Alisson Becker was missing from Liverpool's starting line-up due to a shoulder injury as Adrian came into the side. The other change from the Reds' last top-flight outing, the 3-1 win against Arsenal on Monday, saw Diogo Jota making his first league start for the club, replacing Sadio Mane, who the club announced on Friday had tested positive for coronavirus.
Klopp threw on Takumi Minamino in place of Naby Keita as he tried to get some sort of grip on the game, but they could not cope with the attacking threat of Villa.
Barkley finally got his debut goal in the 55th minute, hitting a shot from outside the box that flew off the boot of Trent Alexander-Arnold and past Adrian.
Salah then grabbed his second of the game with 30 minutes remaining, but it proved only to be a consolation as Villa restored their four-goal cushion six minutes later with Grealish benefiting from another deflection off Fabinho to find the bottom corner.
Grealish then put the exclamation mark on what was an incredible night at Villa Park, grabbing his second of the night as Villa beat the Liverpool offside trap yet again. The Villa captain raced onto McGinn's through ball before calmly beating Adrian to cap a unbelievable night for his side.
Van Dijk: We must all take responsibility
Liverpool defender Virgil van Dijk to Sky Sports: "It's hard to lose the way we have lost tonight.
"First and foremost, well done to Aston Villa. You have to give them the credit they deserve.
"But we are looking at ourselves, it just felt like one of those performances where we just weren't 100 per cent at it from the start until the finish.
"The goals we conceded, we should have done better, but also the chances we had - because we had many - we should have done better.
"It's key to not get crazy or anything but we have to be stepping it up. The performance level between the last game against Arsenal in the league and today was too big. All of us, everyone, has to take responsibility."
What the managers said…
Aston Villa boss Dean Smith: "It was sheer hard work and quality within the team. When Jurgen Klopp says 'Wow!' to you at the end you know you've done well.
"The players executed the game plan against an exceptional team."
Liverpool boss Jurgen Klopp: "I saw a game in which for different reasons Aston Villa did really well and forced all the mistakes we made, and then the game has a specific direction.
"The first goal had an impact, but it shouldn't. Adrian made a mistake for the first goal, but we conceded goals like this in the past.
"The reaction was then, we lost kind of the plot. Our creating was really good, but we did not score. We still had good moments, but those good moments pretty much led to nothing, and their good moments led to big chances or a goal."
Man of the Match - Ollie Watkins
Villa boss Smith on Watkins' performance: "I think there were eyebrows raised over the fee when we brought him from the Championship, but that's doubled now at least. He's a tremendous talent and we've added quality to what I believe was a good strong team anyway."
Watkins: Hat-trick vs Liverpool unbelievable
Watkins admitted it was difficult to comprehend scoring a hat-trick against Liverpool.
"I think when the first one went in, I pinched myself a little bit as it was so early on. I'm just delighted I could contribute, and we won," he told Sky Sports.
"It's unbelievable, before the game I wouldn't think I'd score three goals. But I got a bit of confidence and I should have scored more in the end.
"The game plan was to get in behind them. We fancied ourselves but we didn't think the scoreline would be that."
Opta stats - Liverpool's defensive horror show
- This was the first time Liverpool conceded seven goals in a match in all competitions since April 1963 in a 7-2 league defeat at Tottenham.
- Liverpool are the first reigning English top-flight champions to ship seven goals in a league match since Arsenal against Sunderland in September 1953.
- Liverpool's 11 goals conceded is their most after four games of a league season since 1937-38 (also 11).
- Adrian has made five errors directly leading to opposition goals in his 21 appearances for Liverpool in all competitions; as many as counterpart Alisson has in 92 such matches.
After the international break, Liverpool travel to Premier League leaders Everton for the Merseyside derby at 12.30pm on October 17. On the same day, Aston Villa travel to Leicester City at 3pm.