The CONMEBOL Sudamericana, also known as Copa Sudamericana, is an annual international club football competition organized by CONMEBOL, the governing body of football in South America, 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 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.
A violent football riot erupted in Buenos Aires as Argentine and Chilean fans clashed during the Copa Sudamericana last-16 match...