Arsenal left it late but the impact was just as big as they beat in-form Manchester United 3-2 in front of a rowdy Emirates crowd.
Eddie Nketiah scored the winner after the 90th minute in a pulsating encounter to spark wild celebrations from the home fans.
Mikel Arteta’s men restored their five-point lead at the top of the table following City’s win earlier in the day.
Nketiah was the star after he had cancelled out Marcus Rashford’s opening goal for United before England international Bukayo Saka turned the match on its head with a wonderful strike from distance.
The visitors, dangerous on the break, levelled when Argentine defender Lisandro Martinez headed home.
“It doesn’t get much better than that,” Mikel Arteta told Sky Sports. “The second half especially, the performance was incredible.
“We were composed and determined at the same time. We never panicked. We always believed that we could win it. We showed the right composure in the box a lot of times but the ball didn’t go in. Thankfully at the end it did.”
United now face Nottingham Forest for a place in the EFL Cup final before FA Cup action this weekend.