Pierre-Emerick Aubameyang condemned Manchester United to fresh misery at Old Trafford as his penalty clinched a 1-0 win for Arsenal, while Gareth Bale was the match winner with his first goal since returning to Tottenham in a 2-1 win over Brighton on Sunday.
Aubameyang ended a five-game goal drought in the league when he stepped up to convert a 69th-minute spot-kick after Paul Pogba fouled Hector Bellerin.
The Arsenal captain’s first league goal since the opening weekend of the season gave the Gunners their first league win at Old Trafford since 2006.
United have now failed to win any of their four home league games this season, with the three defeats including a humiliating 6-1 rout against Tottenham.
It is the Red Devils’ worst start to a home league campaign since 1972-73, leaving Ole Gunnar Solskjaer’s team languishing just six points above the relegation zone in 15th place.
Arsenal moved up to ninth, just a point off third, thanks to their first win away at a ‘big six’ rival in 30 attempts.
Bale rescues Spurs
Spurs moved up to second as Bale came off the bench to break Brighton’s resolve in a controversial clash at the Tottenham Hotspur stadium.
Harry Kane’s early penalty put Jose Mourinho’s men in front before the visitors were denied a spot-kick for a pull on Leandro Trossard by Matt Doherty.
Brighton’s bright display got the slice of luck they needed to level 11 minutes into the second-half when referee Graham Scott allowed Tariq Lamptey’s equaliser to stand after what appeared a clear foul on Pierre-Emile Hojbjerg in the build-up, despite reviewing the incident on the pitchside monitor.
Bale got Spurs and Scott off the hook, though, when he powered home a header 17 minutes from time.
“It’s a great feeling,” said Bale. “I just want to come on and make an impact for the team.
“I haven’t played a lot of football. It’s taken time, I’m being patient and working hard when I get chances.”