Manchester United great Sir Alex Ferguson has identified the toughest period of his career.
Ferguson admits the 1989/90 season, when United won the FA Cup, as the most difficult.
He told manutd.com: "Well, I don't say doubt. I think there were periods when you're through a spell of not winning games… 1989 in December, we never won a game. I was brought up in a working-class background.
"Giving in and having doubts never surfaced within me. I was always positive about where I was going, I would look at all my training notes, my team selections and the next day was always going to be better for me, so the doubts came from other people, not from me."
