"It was a really strange situation for me, I had no idea whatsoever.
"A lot of people think I knew something about it. I knew nothing at all until Sir Alex gave me a call, and asked me to come to his house.
"I was expecting him to say 'I'm going to take one of your players' or something else, I wasn't sure.
"We went in and the first thing he said to me was 'I'm retiring'. I said 'Yeah, when?' I mean, he was never going to retire was he? But he said 'next week'.
"His next words were 'and you're the next Manchester United manager'."