INTERNATIONAL CAREER

Ronaldo had previously played for Portugal at the 2002 UEFA European Under-17 Championship and at the U18 and U21 level. He eventually made his full international debut in August 2003, coming on in the second half of a 1-0 victory against Kazakhstan. Ronaldo 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, with Greece once again emerging victorious. Even though Ronaldo could not add to his two goals, his performances at the tournament earned him a place in the team of the tournament.
Ronaldo subsequently 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.
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. However, he returned in the next match in the quarter - final against England.
Ronaldo was named the national team captain for the first time in a friendly match against Brazil on February 6, 2007, a day after his 22nd birthday. This move was in honour of the Portuguese Football Federation president, Carlos Silva, who had died two days before. Scolari explained, "Mr. Silva asked me to make him captain as a gesture. He thought the English fans would give him a difficult time and this was a response. He is too young to be captain but Mr. Silva asked me and now he is no longer with us."
Ronaldo scored a total of 8 goals in Portugal's UEFA Euro 2008 qualifying campaign. On June 11, 2008, he scored the second goal for Portugal and provided an assist for the third goal scored by Ricardo Quaresma against the Czech Republic in Geneva, during the Group stages of UEFA Euro 2008 which ensured Portugal's qualification into the quarter finals of the competition. And in the 1/8 final against Germany, he performed well and created an assist for Nuno Gomes, but failed to save his team from being knocked out by Germany.

2006 FIFA World Cup incident

On 8 July 2006, after the sending off of United team-mate Wayne Rooney for stamping on Ricardo Carvalho in the Quarter Final of the 2006 World Cup between England and Portugal, there was much speculation in the English media that he had influenced Rooney's red card by complaining aggressively to referee Horacio Elizondo. He was also seen in replays winking to the Portuguese bench after Rooney's dismissal. 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. I suppose I do, though, have to remember that on that particular occasion we were not team-mates." However, on 4 July, Elizondo told The Times that the red card was due to the stamp on Carvalho, and not the scuffle afterwards. He said "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."
The Sun published a dart board with a picture of Ronaldo as the bull's-eye in a similar fashion to the one made after the 1998 World Cup for David Beckham by The Daily Mirror, another English tabloid. The angry reaction in England caused Ronaldo to consider leaving United. After the incident, he told reporters that he thought he "should get out of Manchester as the circumstances are not right to keep playing there". He allegedly told the Spanish sports daily Marca that he wished to move to Real Madrid.
In response to the speculation, Sir Alex Ferguson sent his assistant manager Carlos Queiroz to speak to Ronaldo in Portugal, hoping to change the young player's mind, whilst Rooney pleaded with Ronaldo not to leave the team. Ronaldo chose to stay on at United and signed a new five-year contract months later.
Ronaldo was booed by French and English fans during Portugal's semi-final defeat against France, and missed out on the tournament's Best Young Player award, due to an e-mail campaign against him by England fans. 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.