Bruno Fernandes saluted "unstoppable" Amad Diallo after Manchester United's dramatic 2-1 victory over rivals Manchester City.

From 1-0 down, Ruben Amorim's side snatched all three points and local bragging rights in the last two minutes at the Etihad Stadium.

Fernandes' cool penalty cancelled out Josko Gvardiol's first-half header after Amad was felled by Matheus Nunes.

Diallo then turned the match on its head two minutes later, latching onto Lisandro Martinez's lofted ball and rounding Ederson, before volleying into the empty net.

The United man registered the most shots on target (two) and the most touches in the opposition box (10), while also completing five of his eight dribbles. 

And Fernandes was full of praise for the 22-year-old following his match-winning contribution, but insisted he must not rest on his laurels.

"He has been doing well, he has been doing great things and there is still a lot to come from him," the Man Utd skipper told Sky Sports.

"He showed again today he is always alive. That is why he gets the penalty, why he gets the goal. He has been brilliant. When he is like this, he is unstoppable.

"I just want him to keep working, that is what he has been doing. It is great what he did today but I am sure he can do this every week. We want this week in, week out. He is now getting his chances, deservedly."

"We wanted to win this game. It was not easy," Amad added. "In the second half, we pressed well, we wanted to win, and we showed today that we can win any game. Let's enjoy it today and look forward to the next game."