Brighton thrashed Manchester United 4-0 at the Amex Stadium to ensure the visitors will finish the season with their worst points total in Premier League history
The humiliating loss on the south coast means Ralf Rangnick's side can no longer match the 64 points they achieved in the 2013/14 campaign as the German's spell in interim charge before he hands over the reins to Erik ten Hag hit a new low
A Moises Caicedo strike early in the first half (15) was added to after the break by goals from Marc Cucurella (49), Pascal Gross (57) and Leandro Trossard (60) as Brighton, who had not won at home since Boxing Day, produced a brilliant performance to remain on course for their highest top-flight finish
The result means it is mathematically impossible for sixth-placed United to qualify for the Champions League, as they sit five points adrift of fourth-placed Arsenal with one game left to play
After defeats at Manchester City, Everton, Liverpool and Arsenal before this, United have now lost five consecutive Premier League away games - their longest such run since 1981
When asked if the performance in his penultimate match was the worst of his tenure, Rangnick told : "Yes it was, from the first to the last minute
"Not enough in all important areas
 We were second best
 We can only apologise to the supporters
 It was a terrible performance and a humiliating defeat
"Brighton took control of the game from the first whistle and deservedly took the lead in the 15th minute through Moises Caicedo
 The 20-year-old, who had been linked with a move to United before signing for Brighton at the beginning of 2021, took advantage of the ball ricocheting off Alex Telles to tuck a low drive inside the post from the edge of the area
 It was the Ecuador international's first goal for the club and the start of a memorable afternoon for the hosts
Former United forward Danny Welbeck had a chance to make it 2-0 just before the break, but his lofted effort over the stranded David de Gea after Raphael Varane's poor touch had too much power and cleared the crossbar
When Cristiano Ronaldo, two goals away from 700 in his club career, blasted a free-kick from distance into the stands during a half that saw United fail to register a shot on target, a carnival atmosphere for the home fans - part of a record crowd at the Amex - was well underway
United boss Ralf Rangnick responded by bringing on Edinson Cavani and Fred in place of Nemanja Matic and Anthony Elanga for the second period, but Brighton's dominance continued
It took less than four minutes for the hosts to double their lead when Marc Cucurella scored his first Brighton goal by firing into the roof of the net from close range after a Leandro Trossard cutback
 Pascal Gross then got in on the act eight minutes later when a fluid move ended in the German steering a precise shot past De Gea into the far corner from inside the box
With an hour on the clock, Trossard completed the rout when Diogo Dalot's clearance off the line bounced off his chest and into the United net - the goal given after a VAR check for handball
Brighton continued to pick holes in the United defence, hitting the post before Welbeck went close again late on with a strike from 25 yards
United attempted to fight back but a strong goalkeeping performance from Robert Sanchez kept them out, including a smart stop to deny Bruno Fernandes
The visitors did manage to put the ball in the back of the net but Cavani, who is set to leave the club on a free transfer, was clearly offside when he poked home after Harry Maguire flashed a ball across the goalmouth
United have now conceded 56 goals in the Premier League this season, their worst defensive record in a single campaign in the competition
Brighton are ninth, five points off a Europa Conference League spot with two matches remaining
After apologising to Manchester United supporters for the defeat,  admitted his decision to switch to a 4-4-2 formation in the second half was "too much of a risk"
"We gave them too much time, too much space," he told 
 "We couldn't get into a position to stop them playing through our lines
 The game plan was completely different
 We told the players to be as compact as possible and then to release pressure on them
 We couldn't stop them
"I don't think the players ignored the game plan but they weren't able to stop them
 We gave them too much space and time
 When you give technically good players this space, this is what can happen
"In the second half we took the risk to bring on Cavani to play as a second striker, but in hindsight it was too much of a risk to play in a 4-4-2 against them but we had to change the energy
 Today we were second best
"Manchester United's supporters packed out the away end at the Amex but their anger towards the team was easy to hear after their side conceded the fourth goal, chanting en masse: "You're not fit to wear the shirt
"When asked about the chanting, captain for the day Bruno Fernandes agreed with the supporters
He told : "What we did, and by myself, was not enough to be in a Manchester United shirt
 I accept that
 It is not good enough
"They outplayed us
 They always had a solution
 Pressed us better and they deserved the result
"A little bit of everything went wrong
 Quality
 Mentality
 They deserved to win and we deserve to be in the position we are in now
"Having guided Brighton to their best season in the Premier League since promotion in 2017,  was delighted to give the club's supporters a first home win since Boxing Day
He told : "It was nice to give the supporters a performance and a memory, so we're delighted
"We played well from the start and I thought we were the better team
 The boys did everything they could in terms of what we asked them to do
"They defended well, pressed well, created some danger and were brave on the ball
 It was a fantastic performance
"We're on 47 points now, which is an improvement
 We're really happy
"Brighton captain Lewis Dunk said: "It is a special day
 United are a top side and we've let our home fans down this season, so it was a nice moment
"On this showing, it is easy to see why Manchester United were interested in signing Moises Caicedo before his move to the Amex last year
The 20-year-old set the tempo for Brighton all afternoon, producing a calm display in the middle of the pitch to prevent the visitors from ever getting a foothold in the game
It was a mature performance from the Ecuador international, whose impressive first goal for the club could be a sign of things to come
"He's got the quality, he's got the ability to score," Potter said
 It's just getting in the right place and thankfully today he did
 It was a great finish
"He's been amazing since he's been in the team and I'm really happy for him
"Just when it seemed there was nowhere to go, Manchester United's disastrous season plunged to new depths as they were humiliated by Brighton
The 4-0 drubbing flattered United
 It could and should have been an even bigger margin
 Brighton were everything Ralf Rangnick's side were not - well-coached, hard-working, disciplined and creative
"You're not fit to wear the shirt" sang the United fans as even they could not quite believe what was unfolding before their eyes