Even though, Ferguson has not decided yet on the day he'll quit the game, the Old Trafford supremo has given his views on the next United boss.

"The thing is I have not made my mind up when I'm retiring, It's not going to be an easy decision," said Ferguson.

"I have a great assistant in Carlos Queiroz, I think he will be a strong candidate."

Ferguson, who has been in charge of United since 1986, also revealed his admiration to the abilities of some other managers who can lead the Red Devils.

"Alan Pardew at Charlton has got something about him, he is a good young manager, Roy Keane has got a good chance as well," he added.

"Of the older ones, Sam Allardyce is a very influential manager, his way of managing is very different. He is very into the sports science, he had about 16 people working behind the scenes at Bolton."

"He knew how many yards his players were running, how many sprints they were making. During the game he has got all the figures on a big screen behind the dug-out. He will do well at Newcastle."