El Clasico Capitalino (Capital derby), refers to football matches between América and UNAM, both from Mexico City.

The nickname stayed with the public, and all the athletic teams representing the University have been called Pumas; Club América self-proclaimed Las Águilas "The Eagles" wanted to have a representation of an animal that would show pride and domination of its environment.

However, they are also called Los millonetas, a derogatory reference or version of the word millionaire, started when businessman Emilio Azcarraga Milmo, owner of Telesistema Mexicano, bought América from Isaac Bessudo in 1959.

[4] Azcarraga hired the successful president of the Club Zacatepec, Guillermo Cañedo de la Bárcena, and started to hire other notable national and foreigner figures, focusing on money, to form a powerful team, Universidad Nacional instead have employed "La cantera universitaria", a youth development system with football academies and farm teams to success through its history.

[7] Years later, in the 1969–70 season, América were able to get international forward Enrique Borja, news which caused a lot of controversy and shocked the football world due to the strong rivalry between the teams.