Graham recalled the time 25 years ago when he emerged with Ferguson as one of the leading new players in the management of English football.
"He came down from Aberdeen with his great success and reputation and I had done well at Millwall, a difficult job, and was appointed at Arsenal, and I thought: 'I can't wait to compete with this man. I can learn so much from him.' Then we went to Old Trafford on a great run and the moment had come. What happened? We had a fight in the tunnel.
"You never stop fighting with Alex Ferguson but nor can you stop respecting him. You look at his achievements, you look at his hunger to go on winning, and you have to say that there is no one like him in the game."