The Copa Libertadores (Copa Libertadores de America), a competition involving the champions of domestic leagues, was founded in 1960. The format is a knock-out and group stage tournament with knock-out matches determined by two-legged ties. All of the Copa Libertadores champions and runners-up over the years. Have been awarded with a UEFA Champions League berth for the following season. An agreement between CONMEBOL (the South American football confederation) and FIFA (the world's governing body for soccer) known as the "Grupo B" system determines the format of the Copa Libertadores. This arrangement sees the eight best-ranked nations at the end of the initial group stage of the tournament advance to a knockout stage. The winner of the competition qualifies for the next season's edition of the UEFA Champions League. Only four teams have won the title twice: Argentina's River Plate and San Lorenzo de Almagro from Argentina, and Colombia's Atlético Nacional and Millonarios from Colombia. The current champion is Argentine club Boca Juniors who beat Colombian club Atlético Nacional 4-3 on penalties after tying 1-1 after extra time in the final on November 22, 2013 at the Maracanã Stadium in Rio de Janeiro. The runner-up was Colombian club Atlético Nacional.