The Mega-Sena is the largest lottery in Brazil, organised by the Caixa Econmica Federal bank since March 1996.

Today at least four clubs per country compete in the tournament, with Argentina and Brazil having the most representatives (six and seven clubs, respectively).

Champions of the Copa Libertadores\n\n Since its inception, Argentina's leading sides have enjoyed the most success with Independiente winning seven titles and Boca Juniors on six. Brazil's club sides have also performed very well with Sao Paulo, Palmeiras, Santos, Gremio, and Flamengo all winning three titles.