Manchester United legend Roy Keane says people are "frightened" of former manager Sir Alex Ferguson.
Keane was speaking at his book launch yesterday.
"You have to defend yourself," he said. "A lot of people are frightened of him (Ferguson). You can't go against him because you'll never be allowed speak to him again but, thank God, I don't have them problems. Why do people let him get away with that?
"People sit back and are frightened to death of him. I think a lot of managers would probably be intimidated by him, probably bow to him. I think (Roberto) Martinez reckons he was misquoted a few years ago that Ferguson had his disciples. But he obviously does.
"When a manager takes players away from being on loan - I think it was Preston, because his son gets the sack there - it's interesting. Then, all of a sudden, other club's players are being brought back from being on loan."
