The Copa Libertadores, the most prestigious tournament in South America, has always been a dream for many clubs in the region, and in 2005, Tigres UANL had the chance to make history by debuting in this competition. Although the team had been a constant competitor in the Mexican league, its inclusion in this international tournament was a recognition of its growth and development in Mexican football.

The path to the Copa Libertadores was not easy. Tigres qualified after a standout performance in the Liga MX tournament, allowing them to make a name for themselves beyond Mexico's borders. In the group stage, Los Felinos faced renowned teams such as Club Nacional de Montevideo and Palmeiras, showing their courage and determination in every match. The fans, always loyal and passionate, rallied to support the team, creating an electrifying atmosphere at Estadio Universitario.

Despite the challenges, Tigres showcased their ability to compete at the highest level. A standout moment was the match against Nacional, where the Tigres fought until the end, leaving a lasting impression. Although they did not advance beyond the group stage in their first participation, the experience gained was invaluable and laid the groundwork for future incursions in the tournament.

Tigres' participation in the Copa Libertadores was more than just a tournament; it was a step towards cementing the club on the international football map. The experience gained in that first year was crucial for the team's development, which would later become a serious contender in the tournament. Tigres UANL's history was enriched by this experience, and while the results were not as desired at the time, the legacy of their first participation continues to influence the club to this day.