Rio Ferdinand says victory for Manchester United on Sunday against Liverpool can kickstart their season.

United head into Sunday's Old Trafford clash of the north west titans having fallen four points adrift of Premier League title favourites Chelsea.

"This kind of game is always good for galvanising spirit and belief," he said.

"You would be beating one of your closest rivals, so to win this game would be great for team morale.

"Hopefully it will put us on the crest of a wave."