Riyad Mahrez says patience and control was key to Manchester City's win over Manchester United.

The Sky Blues ran out convincing 4-1 winners in front of the Etihad crowd, with Mahrez scoring twice in the second-half.

And Mahrez says he had to remain patient after a frustrating first-half.

"To be fair, I touched like four balls in the first half an hour of the game," Mahrez said.

"In my head, I was like I have to be focused and that the ball will come eventually.

"The first half was pretty good. Second half we were more patient and controlled."