Amad Diallo struck a 90th-minute winner as Manchester United staged a stunning late comeback to beat Manchester City 2-1 in the Premier League on Sunday.

Four-time defending champion City led the Manchester derby 1-0 going into the 88th minute at the Etihad Stadium. But the game was turned round in dramatic fashion as Bruno Fernandes levelled from the penalty spot and Diallo sealed victory for United 鈥� prompting head coach Ruben Amorim to declare 鈥渟omething magic happened.鈥�

鈥淚t was a very tough match but we believe until the end. We managed to score. We needed that win. It was important for us and for our fans,鈥� Amorim said.

City fans jeered at the final whistle as their once dominant team鈥檚 woeful run of form extended to one win and eight losses in 11 games.

鈥淚鈥檓 the boss, I鈥檓 the manager and . It鈥檚 as simple as that,鈥� Guardiola said.

It was the first derby victory for new United head coach Ruben Amorim, in one of his last games in charge of the Portuguese club in November.

But for a long time, it looked like being a third-straight league loss for United after Josko Gvardiol鈥檚 headed goal in the 36th.

Fernandes was guilty of missing the target when through on goal in the second half and United struggled to create chances against a City team that rarely looked like adding to its lead.

But in a dramatic end to the match, Diallo raced after an underhit backpass from Matheus Nunes. Nunes then brought down the United forward in the box and referee Anthony Taylor pointed to the penalty spot.

Fernandes made no mistake this time 鈥� sending Ederson the wrong way.

Moments later, Diallo ran onto a long pass from Lisandro Martinez, flicked the ball high and past Ederson before rolling it into the net from a tight angle.

鈥淲e have a lot to do but it was massive for our fans,鈥� Amorim said.

United is 13th and five points behind fifth-place City, which has seen its title defence unravel during its losing run.

鈥淭his is a big club and in a big club when you lose eight in 10 (11) something wrong is happening,鈥� Guardiola said.