Echipa Nationala A Argentinei

In June 2004, he debuted for Argentina, playing in an under-20 friendly match against Paraguay.n 2005 he was part of a team that won the 2005 FIFA World Youth Championship in the Netherlands. There, he won the Golden Ball and the Golden Shoe,scoring in the last four of Argentina's matches and netting a total of six for the tournament.
He made his full international debut on 17 August 2005 against Hungary at the age of 18. He was substituted on during the 63rd minute, but was sent off on the 65th minute because the referee, Markus Merk, found he had headbutted defender Vilmos Vanczák, who was tugging Messi's shirt. The decision was contentious and Maradona even claimed the decision was pre-meditated.Messi returned to the team on 3 September in Argentina's 1–0 World Cup qualifier away defeat to Paraguay. Ahead of the match he had said "This is a re-debut. The first one was a bit short."He then started his first game for Argentina against Peru; after the match Pekerman described Messi as "a jewel".
On 28 March 2009, in a World Cup Qualifier against Venezuela, Messi wore the number 10 jersey for the first time with Argentina. This match was the first official match for Diego Maradona as the Argentina manager. Argentina won the match 4–0 with Messi opening the scoring.
On 17 November 2010, Messi scored a last-minute goal against South American rivals Brazil after an individual effort to help his team to a 1–0 win in the friendly match, which was held in Doha. This was the first time that he had scored against Brazil at senior level.Messi scored another last-minute goal on 9 February 2011 against Portugal in a penalty kick which he give his side a 2–1 victory in the friendly match, which was held in Geneva, Switzerland.