PEP GUARDIOLA was watching from home but will have switched off halfway through the first half and done something more rewarding.
Anyway, the Manchester City manager had surely already seen enough of the club’s shambolic neighbours this season to not rely on them.
The end of this season is proving to be a bit special but here was the least surprising result.
For 24 hours at least, Liverpool returned to the summit of the Premier League for the first time since October.
Jurgen Klopp’s quadruple-chasing team, inspired by the brilliant Thiago Alcantara, took another step towards delivering the most successful season in the club’s history.
And in total and utter contrast, this weak and shambolic United team illustrated exactly why this is the club’s worst team since the 1980s.
FREE BETS AND SIGN UP DEALS – BEST NEW CUSTOMER OFFERS
The Egyptian had not scored in his previous six matches so was always going to end his worst goal run for three years.
Salah completed a move involving 25 passes and 10 players – including keeper Alisson – all touched the ball as they toyed mercilessly with United’s players.
Not many teams could have lived with a Liverpool team putting together a move like this.
Equally, you have to wonder about the state of the Premier League if United end the season as the sixth best team in England.
Rangnick said after the game: “It’s embarrassing. It’s completely disappointing and humiliating.
“We just have to accept they are six years ahead of us.”
The best comparison out there was Luiz Diaz, the signing from Porto in January, who once again caused all sorts of problems and scored the opening goal in under five minutes and set up Sadio Mane’s third.
Luiz cost £37m. Swap those two numbers around and you have the transfer fee for Jadon Sancho, one of United’s big signings last summer but he who only arrived as a second half substitute for Phil Jones.
Aware of the early storm his team faced, Ralf Rangnick started with a five-man defence which included Jones, making only his second appearance in the Premier League since January 2020.
The idea was that playing right-footed Diogo Dalot at left wing-back would help deal with Mo Salah cutting inside from the right.
That was the plan, anyway.
But Dalot was caught out completely as Liverpool attacked down the right through Salah and he delivered a low cross for Diaz to smash the ball in unchallenged.
So even before Liverpool’s fans, impressively, applauded United No7 Ronaldo in the seventh minute after the United player mourned the death of his baby boy, United found themselves trailing.
Booed off by his own fans against Norwich on Saturday, Paul Pogba was jeered as he hobbled off the pitch in under 10 minutes to be replaced by Jesse Lingard.
Depending on the injury, that could even be Pogba’s last appearance in a United shirt.
Then came the second goal which put an early end to this total mismatch.
This was fabulous, fantasy football, Diaz was involved again, of course, but so was defender Joel Matip with some great skill in an area where he should be getting a nosebleed.
Ultimately, it was Mane who curled a wonderful pass looping over the head of Harry Maguire and Salah took one touch before sidefooting a shot beyond a helpless David De Gea.
United offered nothing up front. Marcus Rashford got in behind the home defence once in the first half but his first touch was dreadful.
Rangnick replaced Sancho for Jones at half-time and there was more balance in the team and they had a decent 10 minutes or so.
Alisson delivered a double save to debut Rashford and Anthony Elanga but despite the linesman’s flag, a VAR check could have fallen in United’s favour had one of their players scored.
With Liverpool sort of drifting, Mane struck for a fifth goal in five games but only his second against United.
Andy Robertson beat Elanga to a challenge to set up the attack but again, it was down to the brilliance of Diaz who spotted Mane hovering around the penalty spot to finish easily.
With five minutes left, Salah completed the misery with a shot which took a slight deflection off Aaron Wan-Bissaka and floated over the head of De Gea.
For Liverpool, they will now focus on another massive match and the Merseyside derby against Everton on Sunday.
As for United, they just look broken and in disarray. The season cannot come soon enough.
And the fact they have just lost 9-0 on aggregate to Liverpool sums up their sorry state.