When Copa started Leo was the youngest player in the tournament. Messi played his first game in Copa America on 29 June 2007, when Argentina defeated United States 4-1 in the first game. In this game, Messi showed his capabilities as a playmaker. He set up a goal for fellow striker Hernán Crespo and had numerous shots on target. Tevez came on as a substitute for Messi in the 79th minute and scored minutes later.
His second game was against Colombia, in which he won a penalty that Crespo converted to tie the game at 1-1. He also played part in Argentina's second goal as he was fouled outside the box, which allowed Juan Roman Riquelme to score from a freekick, and increase Argentina's lead to 3-1. The final score of the game was 4-2 in Argentina's favor and guaranteed them a spot in the tournament's quarterfinals.
In the third game, against Paraguay the coach rested Messi having already qualified for the quarter-finals. He came off the bench in place of Esteban Cambiasso in the 64th minute, with 0-0. In the 79th minute he created a goal for Javier Mascherano.
In the quarterfinals, as Argentina faced Peru, Messi scored the 2nd goal of the game, from a Riquelme pass in a 4-0 win.
During the semi-final match against Mexico, Messi scored a lob over Oswaldo Sanchez to see Argentina through to the Final.Argentina went on to lose to Brazil in the Final. Messi was given the Young Player of the Tournament award.