Manchester United legend Roy Keane admits he rates Brian Clough as a greater manager than Sir Alex Ferguson.
In his new autobiography The Second Half, Keane says he still rates former Nottingham Forest boss Clough as the better of the two, claiming Ferguson was "pure business" and lacked warmth.
"I worked under two great managers and I put Brian Clough ahead of Alex Ferguson for a simple reason. What was the most important thing in my football career? Brian Clough signing me. That kick started everything," he writes.
"Different managers, both brilliant. I think Clough's warmth was genuine. I think with Sir Alex Ferguson it was pure business - everything is business. If he was being nice I would think: 'This is business, this'.
"He was driven and ruthless. That lack of warmth was his strength. United was a much bigger club than Forest but his coldness made him successful.
"His message was the same. I was never once confused by one of his team talks or his tactics or his training. The message was always fresh. I must have heard him talk 500 times and I always thought: 'Yeah, that was good'.
"I think that's amazing. As a manager I would take Clough's warmth and Ferguson's ruthlessness and put them in the mix - but also add my own traits."
