Manchester United midfielder Scott McTominay says Manchester City couldn't handle their counterattacks after victory on Saturday.
Marcus Rashford from the spot and fit-again Anthony Martial struck the goals for United in the 2-1 win.
McTominay said, "It was always going to be difficult against a top team and some world-class players but we were frightening on the break.
"That gave us a platform and we withstood some pressure in the second half. We knew we had a plan and that first 30 minutes epitomised everything we spoke about. It was nice to see that pay.
"This year is has not also been the case but that shows how when you work hard it comes off.
"The second half was tough, we had to withstand lots of pressure with the way they play.
"It is a sweet one and celebrating like that in front of the fans is a beautiful thing."