IT might not have seemed like it this season, but it's usually quite difficult to beat Manchester United.
In fact, only SIX teams in the world have a 100 per cent record against the Red Devils.
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Erik ten Hag's side lost 14 of their 38 Premier League games this past campaign, as United finished eighth in the table, their lowest ever finish.
But they remain England's most successful side - with the shock FA Cup final win over neighbours Manchester City their latest piece of silverware.
In fact, it's a surprise there are any teams who have only ever beaten the Old Trafford giants.
Here are the six sides who can stake claim to that honour... plus one who get there on a technicality.
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1-0 Bootle Reserves in 1890
You are probably thinking Manchester United did not exist in 1890.
Before they became the club everyone recognises today they were called Newton Heath.
And, in 1890, they faced a 1-0 defeat to Merseyside club Bootle Reserves, in the second qualifying round of the FA Cup.
Despite Newton Heath becoming one of the most recognised clubs in the world, Bootle sit in the seventh tier Northern Premier League - but they can still say they have a 100 per cent win rate against the Red Devils.
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1-0 loss to Lazio in 1999
Despite Lazio being one of the biggest clubs in Italy, United have only ever played them once.
That came in August 1999, in the Uefa Super Cup.
Despite the fact United were European champions and Treble winners after that final against Bayern Munich, they came up short against the Romans.
Lazio were managed by Sven-Goran Eriksson with Marcelo Salas scoring the only goal of the game.
3-1 loss to Vasco da Gama in 2000
A year later, Manchester United flew to Brazil to compete in the inaugural Club World Championship, after infamously pulling out of the FA Cup.
It was not a successful adventure. First, they needed an 88th minute equaliser to draw 1-1 with Mexican champions Necaxa.
Then Vasco da Gama joined the 100 per cent Club by sticking three past the Red Devils.
1-0 loss to Southend in 2006
In the early stages of 2006-07 Carling Cup, Sir Alex Ferguson's side made their way down to the Essex coast.
Cristiano Ronaldo and Wayne Rooney started against the then-Championship strugglers.
But all they could do was watch when Freddie Eastwood hit a free kick past Tomasz Kuszczak and into the back of the net.
2-1 loss to Zenit in 2008
Next are Zenit St-Petersburg, who stunned the Red Devils in the 2008 Super Cup.
Bizarrely, the big-spending Russians had just won the Uefa Cup final in Manchester, while United beat Chelsea on penalties in Moscow in the Champions League final.
First future Fulham starPavel Pogrebnyak struck from a corner before midfielder Danny danced through United's defence and doubled the Russians' lead.
United pulled one back through Nemanja Vidic before Paul Scholes appeared to have netted an equaliser.
However, the England international had actually punched the ball in and was sent off for a second yellow.
4-0 loss to MK Dons in 2014
Louis Van Gaal welcomed one more member to the 100 per cent club in 2014.
And this one was a hammering.
MK Dons must have thought they were up against it when they drew United out the hat in the Capital One Cup.
But doubles from Will Grigg and Benik Afobe saw the Red Devils off with embarrassing ease.
2-2 Fleetwood Rovers 1886
How can a 2-2 draw mean a 100 per cent win rate?
Newton Heath entered the first round of the FA Cup.
This was their first competitive match since their inception in 1876, and a crowd of 2,000 watched them draw 2-2 against Fleetwood Rovers.
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This would normally have meant a replay... but officials decided half an hour of extra time should settle the tie.
Newton Heath refused and forfeited the game... and have never played Fleetwood Rovers again.
SunSport's verdict on Man Utd flops
Sir Jim Ratcliffe and Ineos have a busy summer ahead to get Man Utd's squad in order for next season. Below SunSport gives it verdict on how they should deal with the Red Devils flops this summer.
Andre Onana - STAY: After a dodgy start at Old Trafford Onana has proven to be one of the more reliable members of the squad this season despite being peppered with shots constantly.
Altay Bayindir - GO: Reports in February suggested Bayindir was unhappy with his bit part role at Man Utd amid interest from Turkish giants Galatasaray. If profit can be made on a sale then it should be done.
Tom Heaton - STAY: Veteran goalkeeper Heaton, 38, is a reliable back-up and is on a relatively small wage at the club. So long as he is happy it makes sense to keep him.
Aaron Wan-Bissaka - GO: Wan-Bissaka, 26, has never managed to make the right-back position his own. With his contract up in 2025 it makes sense to cash in now.
Diogo Dalot - STAY: Dalot, 26, has been one of Man Utd's most consistent performers this season.
Raphael Varane - GO: If it wasn't for his injury record there would be a strong shout to keep Varane, but costs need to be cut to allow the squad to be freshened up.
Harry Maguire - GO: Maguire has showed he has the right character to be at Man Utd but overall ability and desired profile are another matter, with Maguire too slow to play in a high line defence.
Lisandro Martinez - STAY: Martinez, 26, is second to none in terms of build up play. He needs a long-term defensive partner on the right side and to cut out the injuries which have plagued him this season.
Jonny Evans - GO: Veteran campaigner Evans could easily be on the stay list if he was only going to be a bit part player. But he has shown his advanced years at times this season.
Victor Lindelof - GO: Lindelof, 29, has been reliable if not unremarkable in his Man Utd career. He has one year left on his contract so should be moved on if a decent transfer fee can be got for him.
Willy Kambwala - STAY: He should be given the opportunity to mature for a few years behind a senior CB pairing before stepping into the first team as a starter or being moved on.
Luke Shaw - GO: One of the Premier League's best left-backs when fit, Shaw has been a good servant when available. But alas that has been his Achilles heel once again this season.
Tyrell Malacia - STAY: Malacia, 24, was decent enough to earn some merit in his first season at Man Utd before injury ended his season and inadvertently led to his second season being a write off.
Sofyan Amrabat - GO: Amrabat, 27, looked like a world beater at the Qatar World Cup with Morocco. But he's had an underwhelming season in England and his loan spell will almost certainly not be made permanent.
Casemiro - GO: An alarming physical decline has seen him turn from key star to burden. If a club is willing to buy the 32-year-old - who has two more years on his contract - then United should snatch their hand off.
Christian Eriksen - GO: Eriksen proved a useful asset and Ineos should look to bring in another player with similar traits, but frankly his legs have looked gone towards the end of this season.
Kobbie Mainoo - STAY: The first of the so-called untouchables, Mainoo has been a rare glimmer of hope in the Red Devils midfield this season.
Mason Mount - STAY: Mount can be given the benefit of the doubt until summer 2025 at least after a debut season riddled with injury.
Scott McTominay - STAY: McTominay, 27, has proven himself to be a brilliant plan B off the bench this season, and that is exactly why Ineos should look to keep him.
Bruno Fernandes - STAY: Man Utd's best player since his arrival just over four years ago, Fernandes, 29, remains second-to-none when it comes to creating chances while his tenacity boosts those around him.
Antony - GO: There's a case to argue that Antony may be the worst pound-for-pound signing in Premier League history. Despite some memorable moments he simply isn't Man Utd quality.
Anthony Martial - GO: Ultimately Martial needs to be let go when his deal runs out this summer after an appalling injury record of late.
Marcus Rashford - STAY: As easy as it would be to say Rashford should leave the club this summer, it is difficult to look at the market and find many available players capable of scoring 30 goals a season.
Alejandro Garnacho - STAY: Another third of the untouchables trio, Garnacho has made the right-wing his own since coming into it. He's a raw talent but has shown he has the quality to improve.
Rasmus Hojlund - STAY: A slow burner in his first Man Utd season, the 21-year-old has often been starved of supply which has led to him being unable to get the goals his movement and unselfish play often merits.
Amad Diallo - STAY: In the fleeting moments he has been on the pitch for Man Utd this season, Diallo has looked dangerous and exciting. He should be given a chance to flourish with some proper chances in the first team across a whole season.