Manchester City moved four points clear at the top of the Premier League by surviving a late scare to beat a Leeds side playing under new manager Sam Allardyce for the first time.
Two fine first-half goals by Ilkay Gundogan had done the damage for City, who appeared utterly dominant as they headed towards their 10th straight league win.
Gundogan's first neat finish, which came after Riyad Mahrez found him in space on the edge of the area, was into the bottom left-hand corner of Joel Robles' goal.
His second, again with Mahrez the provider, was identical apart from that he found the opposite corner of the net.