The Copa Ricardo Aldao (English: Ricardo Aldao Cup), popularly called Campeonato Rioplatense and Copa Río de La Plata, was an official AFA-AUF football club competition contested annually, albeit irregularly, between the league champions of Argentina and Uruguay.

[3] Many important footballers played in the competitions such as the Argentines Jose Manuel Moreno, Angel Labruna, Guillermo Stabile, Alfredo Di Stefano, Adolfo Pedernera, Amadeo Carrizo, Carlos Peucelle, Felix Loustau, Nestor Rossi, Antonio Sastre, Bernardo Gandulla, the Italian-born Renato Cesarini, the Uruguayans Roque Máspoli, Ángel Romano, Obdulio Varela, Hector Scarone, Juan Alberto Schiaffino, Anibal Paz, Severino Varela, and Paraguayan legend Arsenio Erico, among others.

Friendly matches were common between clubs from Argentina and Uruguay in the early 1900s due to the close proximity of the nations.

Inevitably, a match to decide which national champions were the best formulated; the trophy of the competition was donated by Ricardo Aldao, then president of both, club Gimnasia y Esgrima (BA) and dissident association "Federación Argentina de Football".

[4] Asociación Uruguaya de Fútbol (AUF) and Argentine Football Association (AFA) studied the situation on 22 January 1941, and announced that a two-legged format would be adopted in the following seasons.