The CONMEBOL Libertadores, also known as Copa Libertadores de América (Portuguese: Copa/Taça Libertadores da América), is an annual continental club football competition organized by CONMEBOL since 1960. It is the highest level of competition in South American club football. The tournament is named after the Libertadores (Spanish and Portuguese for liberators), the leaders of the Spanish American wars of independence and Brazilian independence, so a literal translation of its former name into English is "Liberators of the Americas' Cup".
The competition has had several formats over its lifetime. Initially, only the champions of the South American leagues participated. In 1966, the runners-up of the South American leagues began to join. In 1998, Mexican teams were invited to compete and contested regularly from 2000 until 2016. In 2000 the tournament was expanded from 20 to 32 teams. Today at least four clubs per country compete in the tournament, with Argentina and Brazil having the most representatives (six and seven clubs, respectively). A group stage has always been used but the number of teams per group has varied.