Ronaldo has given a candid first interview since rejoining Man United.
On Sir Alex's role in the transfer, the 36-year-old explained: "As everybody knows, since I signed for Manchester [United] at 18, Sir Alex Ferguson was the key.
"I remember when we played against Manchester when I was at Sporting Lisbon. For me, Sir Alex Ferguson is like a father in football for me. He helped me a lot, he taught me many things, and in my opinion of course he had a big role because the relationship that we had, we keep in touch all the time, and he's an unbelievable person.
"I really like him a lot and he was the main key for me to be in the position that I am, that I signed for Manchester United."
Ronaldo will be managed by his former Man United teammate, Solskjaer.
He's already spoken to The Red Devils boss ahead of landing in England, but expects a face-to-face meeting upon his arrival.
He added: "Well, we had a chat, but of course I'm going to have time to speak with him face to face, to know what he expects.
"As you know, I played with him for two or three years at Manchester United so I have a good relationship with him but now with a different role, I'm a player and he's a coach.
"But it doesn't matter, my relationship with him is great and as I say before, I'm there in Manchester to help the team achieve his results and the coach can count on me for whatever he wants.
"So, I'm available for everything."
Ronaldo is currently on international duty with Portugal for their World Cup qualifiers.
Once club football resumes, the five-time Ballon d'Or winner could make his second Man United debut against Newcastle United on September 11.
Featured Image Credit: Manchester United/PA
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