Query: when did lionel messi play his first game for barcelona

Relevant passages:
Lionel Messi <=SEP=> Born and raised in central Argentina, Messi was diagnosed with a growth hormone deficiency as a child. At age 13, he relocated to Spain to join Barcelona, who agreed to pay for his medical treatment. After a fast progression through Barcelona's youth academy, Messi made his competitive debut aged 17 in October 2004. Despite being injury-prone during his early career, he established himself as an integral player for the club within the next three years, finishing 2007 as a finalist for both the Ballon d'Or and FIFA World Player of the Year award, a feat he repeated the following year. His first uninterrupted campaign came in the 2008â€“09 season, during which he helped Barcelona achieve the first treble in Spanish football. At 22 years old, Messi won the Ballon d'Or and FIFA World Player of the Year award by record voting margins.

Lionel Messi <=SEP=> As the Messi family had relatives in Catalonia, they sought to arrange a trial with Barcelona in September 2000. First team director Charly Rexach immediately wanted to sign him, but the board of directors hesitated; at the time it was highly unusual for European clubs to sign foreign players of such a young age. On 14 December, an ultimatum was issued for Barcelona to prove their commitment, and Rexach, with no other paper at hand, offered a contract on a paper napkin.[19][21] In February 2001, the family relocated to Barcelona, where they moved into an apartment near the club's stadium, Camp Nou. During his first year in Spain, Messi rarely played with the Infantiles due to a transfer conflict with Newell's; as a foreigner, he could only be fielded in friendlies and the Catalan league. Without football, he struggled to integrate into the team; already reserved by nature, he was so quiet that his teammates initially believed he was mute. At home, he suffered from homesickness after his mother moved back to Rosario with his brothers and little sister, MarÃ­a Sol, while he stayed in Barcelona with his father.[16][21][22]

Lionel Messi <=SEP=> After a year at Barcelona's youth academy, La Masia, Messi was finally enrolled in the Royal Spanish Football Federation (RFEF) in February 2002. Now playing in all competitions, he befriended his teammates, among whom were Cesc Fàbregas and Gerard Piqué.[23] After completing his growth hormone treatment aged 14,[24] Messi became an integral part of the "Baby Dream Team", Barcelona's greatest-ever youth side. During his first full season (2002–03), he was top scorer with 36 goals in 30 games for the Cadetes A, who won an unprecedented treble of the league and both the Spanish and Catalan cups.[23][25] The Copa Catalunya final, a 4–1 victory over Espanyol, became known in club lore as the partido de la máscara, the final of the mask. A week after suffering a broken cheekbone during a league match, Messi was allowed to start the game on the condition that he wear a plastic protector; soon hindered by the mask, he took it off and scored two goals in 10 minutes before his substitution.[26] At the close of the season, he received an offer to join Arsenal, his first from a foreign club, but while Fàbregas and Piqué soon left for England, he chose to remain in Barcelona.[21][27][28]