Ronaldo joined Sporting’s different youth players United Nations agency trained at the world Sporting, the club’s soccer academy, in Alcochete. He became the sole player ever to play for Sporting’s under-16, under-17, under-18, B-team, and also the team, all at intervals one season. He scored 2 goals in his league debut on seven Gregorian calendar month 2002, that Sporting CP won 3–0 against Moreirense, whereas that includes for Portuguese Republic within the 2002 European Under-17 Championship.