The Rojiblancos thought they had signed the Portuguese forward when he was a promising teenager after they received a signed document from an intermediary in Lisbon.

Long before he moved to Real Madrid, Cristiano Ronaldo could have ended up at city rival and Champions League final opponent Atletico.Circa 2000, the Rojiblancos received a signed document informing the club that a teenage Ronaldo and Ricardo Quaresma would be heading to the Vicente Caleron, a biography of super agent Jorge Mendes revealed.The document was in possession of former Atletico president Jesus Gil and should have seen Ronaldo join the club from Sporting Clube de Portugal, according to the book The Keys to Mendes."My father had a document from an intermediary to bring in Quaresma and Cristiano and it was signed," Miguel Angel Gil Marin says in the book."Cristiano would have been 15 or 16. It was a document from an intermediary who had the power at Sporting to bring the player to Atletico."However, Mendes did not represent Ronaldo at that point and the move never materialized.Gil Marin is Atletico's CEO and maintains a warm relationship with Mendes, with the two men often dining together in Madrid.On one occasion in 2013 Ronaldo was also present as the pair met at a restaurant in Madrid, sparking rumors of a possible interest in the player from Atletico, a secret strategy to bring Radamel Falcao to Real and other theories. However, the meeting was merely about shared business interests.As it turned out Ronaldo remained at Sporting until moving to Manchester United in 2003. He later joined Real in 2009 for a then world-record fee.The Portuguese has revealed he is now hoping to spend the remainder of his career at the Santiago Bernabeu and on Saturday he has the opportunity to win his second Champions League crown for Los Blancos - having taken the first (and second overall) with a win over Atletico in 2013-14.At San Siro Cristiano will turn out for Real in the season's showpiece fixture. But had things been different, he could have been lining up in the red and white of Atletico instead.