Manchester United legend Roy Keane has warned Manchester City not to write off his old club.

Keane says City were worthy champions ... this season.

Keane said: "City won both games, scored more goals and conceded less so they are worthy champions and good luck to them. But never write off United. Never doubt United. They won the league on goal difference and all of a sudden we are saying how brilliant Man City are. It was goal difference. There are fine lines at this level.

"United always bounce back. It's in the nature of the club. They will probably buy one or two players. It's exciting for the people of Manchester. I think United fans will actually enjoy that challenge because the games are closer."