Rio Ferdinand says he's learned plenty about captaincy from Manchester United legend Roy Keane.

The United defender will lead England at the World Cup.

He said: "All the captains have different elements that are good but I think I took most from Roy Keane, more than anything in terms of honesty and speaking your mind on things.

"Keano was never one to hold back. Sometimes it wasn't taken very well but, a lot of the time when you look back on it, people took something from what he said.

"I wouldn't agree with all of it and I didn't agree with some of the things he said but there were bits of it you take out.

"As long as you speak your mind, and get it off your chest in the right way, then you've got a chance of adding something to someone."