Manchester United legend Sir Bobby Charlton admits Manchester City's emergence has re-energised Sir Alex Ferguson.

Charlton can't see Ferguson retiring anytime soon.

"The rivalry with City, and the way they have re-emerged, has probably provided him with an extra incentive. He just hates losing, no matter who the opposition are, and the defeat on Monday night will have hurt him.

"But the great thing is, he will pinpoint exactly why we lost and make sure it doesn't happen again."