Manchester United have been leapfrogged by Bournemouth in the Premier League table after Josh King scored the only goal of the game against his former side on the south coast.
An unnecessary scuffle between Jefferson Lerma and Fred threatened to be the biggest talking point of the first half, but former Manchester United star Josh King opened the scoring just before half-time with a stunning solo effort.
Liverpool loanee Harry Wilson almost doubled their lead after the break but was denied by De Gea, with Bournemouth impressing on the counter-attack while also defending relatively easily when they were out of possession.
Substitute Mason Greenwood rattled the post from close range with his first touch of the match as United looked for an equaliser, but the visitors couldn't find the back of the net and ended up losing their first match in almost a month.
Key Talking Point
The visitors might have dominated the early stages of the game, especially attacking with Aaron Wan-Bissaka and Daniel James on the right side of the pitch, Bournemouth started to match Manchester United as the game went on.
Bournemouth's ability to grow into the game paid dividends before half-time when they took the lead, setting up a second-half which was due to play perfectly into the hosts' hands as they could soak up pressure and counter-attack.
That's exactly what the Cherries looked to do in the second half and they almost doubled their lead on the break, while defenders Steve Cook and Nathan Ake kept Manchester United's forwards relatively quiet to see out the match.
Ramsdale (6); Smith (8*), S. Cook (6), Ake (7), Rico (5); H. Wilson (7), Lerma (6), Billing (8), Fraser (6); C. Wilson (7), King (8).
Substitutes: L. Cook (N/A).
There wasn't one standout player for Eddie Howe's side, with any number of their attacking players well worth a special mention for their performance against Manchester United.
But, in fact, it was one of the club's unsung heroes in defence who provided the platform for Bournemouth to go on to pick up a vital three points on Saturday.
While Daniel James was causing headaches for Diego Rico, right-back Adam Smith had Marcus Rashford in his pocket for almost the entirety of the match, often being helped out in defence by the hardworking Harry Wilson.
Brilliant work from Adam Smith— Karthik Raj (@kartcric) November 2, 2019
AWB is an expensive Adam Smith— Matt Kron (@mattkron17) November 2, 2019
Adam Smith had a big invisible hand in that goal— Muhammad Adam (@moehadam) November 2, 2019
Smith didn't just put a foot wrong in defence, but the 28-year-old also offered the Cherries a brilliant outlet going forward and even claimed the assist for King's winner.
Key Talking Point
Ole Gunnar Solskjaer's side didn't look full of ideas when it came to creating opportunities going forward, but the one they did have - giving the ball to Daniel James at all costs - looked like it could be the key to picking up a fourth consecutive away win.
Bournemouth left-back Diego Rico was being caught slightly out of position too often and United's best chances came down their right side during the first-half, but the visitors stopped looking to exploit that area as the game went on.
Chances started to dry up until the last 10 minutes of the game, but it was too little too late for Solskjaer's side and they wasted the chance to build on their brilliant run of form in recent weeks.
De Gea (6); Wan-Bissaka (7), Lindelof (6), Maguire (6), Young (5); McTominay (7), Fred (6), Pereira (5); James (8*), Rashford (6), Martial (6).
Substitutes: Lingard (6), Greenwood (7), Williams (6).
Not for the first time this season (and probably not for the last either), Daniel James was Manchester United's standout player in the Premier League.
The Wales international hasn't found the back of the net in some time, but James worked tremendously to get in behind Diego Rico throughout the first half and it was his movement which helped to create United's best chances in the match.
Daniel James was by far our best player in the first half— Ugbedeojo (@Certifiedopeboi) November 2, 2019
Daniel James is man united player of the season with the season not gone half— Chisky (@Chiskyyy) November 2, 2019
Daniel James is such a beauty to watch.— Chukwuemeka礪 Nwachukwu (@Chukwu_emekah) November 2, 2019
Daniel James put in 3 good balls into the box in the first 15mins and we managed to miss all of them as usual— RashySZN (@PaPaKojo_) November 2, 2019
Although there was an obvious weakness down Bournemouth's left side, Manchester United started to attack across the front three - Adam Smith was largely untroubled by Marcus Rashford on the other side of the pitch - and chances dried up for Solskjaer's side.
Eddie Howe's Bournemouth travel to face Newcastle United next weekend, looking to pick up their first win away from home since September 20.
Manchester United have Europa League action to attend to in midweek before they welcome Brighton & Hove Albion to Old Trafford.