International career
Ronaldo made his international debut in August 2003, against Kazakhstan. He scored Portugal's only goal in their 2–1 loss to Greece in the opening match of Euro 2004 and the first goal of the semi final against the Netherlands, which Portugal won 2–1. The final saw a rematch of the opening game of the tournament, and again, Greece emerged victorious.Ronaldo represented Portugal at the 2004 Summer Olympics, and was the second highest scorer in FIFA World Cup qualification in the European zone with 7 goals. As of 17 June 2005, he has scored 11 goals in 25 appearances for his country.
Ronaldo scored his first World Cup goal against Iran with a penalty kick.
In the Round of 16, he left Portugal's 1-0 win over Netherlands injured after a high tackle by Khalid Boulahrouz.
Ronaldo recovered in time to play in the quarter-final of the competition against England on 1 July 2006, scoring the final penalty shoot-out that sealed the Portuguese victory. However, Ronaldo was widely criticised for his gamesmanship by the English Press. England's Wayne Rooney stamped on Portuguese defender Ricardo Carvalho's groin after a struggle for the ball. Ronaldo, Rooney's Manchester United team-mate, then sprinted over to appeal to the referee. Rooney pushed Ronaldo before receiving a red card. Former England striker and TV pundit Alan Shearer suggested Rooney might "stick one on Ronaldo" when the two meet again. BBC pundit Gary Lineker showed viewers footage of Ronaldo winking at the Portuguese bench after Rooney was sent off. Also before the match, Ronaldo was seen to whisper something in Rooney’s ear as he walked by him, with a headbutt feint from behind. Ronaldo's behaviour in the match also came under fire from several England players, most notably Steven Gerrard and Frank Lampard. In their respective autobiographies, Gerrard claimed that 'a dark side stains Cristiano Ronaldo's game', whilst Lampard said Ronaldo's actions made him 'sick'.
Sven-Göran Eriksson told reporters that the referee Horacio Elizondo explained after the match that the red card was for the initial challenge on Carvalho. Elizondo confirmed the initial story told by Eriksson to the The Times, saying "It was violent play and therefore he got a red card. People can say what they want (about Ronaldo) but this had absolutely no influence. For me it was a clear red card, so I didn't react to the Portuguese players." Portuguese keeper Ricardo backed Ronaldo, saying: "There always has to be a scapegoat when someone loses… I don't think influenced the referee. The referee was right on top of it."
Ronaldo said, "I complained to the referee about the foul but I didn't ask for a red card". After the match he admitted reports that Real Madrid were interested in him were correct, and was now more likely to go to the Spanish club or elsewhere over the summer transfer period.
After England's elimination Ronaldo was attacked by the English tabloids. The Sun made a dart board with a picture of his wink in a similar fashion to the one made after the 1998 World Cup for David Beckham by The Daily Mirror, another English tabloid.
Ronaldo has said that Rooney was a friend, and that he was not trying to get Rooney a red card. Rooney said, "I bear no ill feeling to Cristiano but am disappointed that he chose to get involved."
Wayne Rooney was investigated by FIFA's disciplinary committee after being sent off during England's World Cup quarter-final defeat against Portugal, banned for two competitive matches and fined 5 000 Swiss francs (2 207 pounds).
On July 5, in the semi-final against France, which Portugal lost 1-0, Ronaldo was loudly booed each time he had possession of the ball, by French and English fans alike. At the end of the match, he broke down in tears for his loss, like he had done on many other occasions. Though generally considered the best player on the pitch during the match, several reports accused Ronaldo (and other members of his side) of trying to influence the referee by diving. There have been similar accusations in the past, and Ronaldo has been booked for the offence more than once in the English Premiership. Shortly after he dropped back to second place in the online voting for Best Young Player, it was reported by BBC Sport that this was partly because of an email campaign by an England supporter urging people to vote for Luis Valencia, who was the second place player to prevent Ronaldo from winning the award. Though the online vote only affected the nomination process, FIFA Technical Study Group awarded the honours to Germany's Lukas Podolski, citing Ronaldo's behaviour as a factor.