The CONMEBOL Sudamericana, named as "Copa Sudamericana" (; ) is an annual international club football competition organized by CONMEBOL since 2002. It is the second-most prestigious club competition in South American football. CONCACAF clubs were invited between 2004 and 2008. The CONMEBOL Sudamericana began in 2002, replacing the separate competitions Copa Merconorte and Copa Mercosur (that had replaced Copa CONMEBOL) by a single competition. Since its introduction, the competition has been a pure elimination tournament with the number of rounds and teams varying from year to year.