Ronaldo is delighted with the influence that Fergie had on him during his time at Old Trafford.
Ronaldo left United and joined Real Madrid in a world-record deal last summer.
“Ferguson is a coach who understands his players and supports them in everything he can. He was a father figure to me,” he explained.
“My debut was my best moment at Manchester United.”
“I always wanted to play for Real Madrid because of its grandeur and success,” he continued.
“I didn’t know what to say during my presentation. It all went well. I may not have looked nervous but I was.”