Made by the team behind award-winning films about Ayrton Senna and Amy Winehouse, 'Ronaldo' charts Ronaldo's life between Real Madrid's European Cup triumph in 2014 and his third Ballon d'Or crown in January 2015.
The film's revelations include a confession by Ronaldo's mother, Dolores, that she wanted to abort him, while Ronaldo talks openly about his brother and late father's struggles with alcoholism.
He also defends his decision not to disclose the identity of his son Cristiano's mother, but when asked yesterday if he felt he had opened up too much, the Madrid superstar replied: "Maybe, but I just had fun.
The film captures intimate moments at home between Ronaldo and his five-year-old son -- who he dubs "my successor" -- and shows him relaxing with friends including his agent, Jorge Mendes.
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The Portugal captain, 30, discusses his obsession with winning the Ballon d'Or, which he has won for the past two seasons after seeing his great Barcelona rival Lionel Messi walk away with it for the previous four years.
"I've started seeing him as a person, not a rival," Ronaldo says of the Argentine. "But we are always busting our balls to see who is better."