In 1951, he returned to Argentina to play for the top club CA River Plate in Buenos Aires, where he had little success competing with players like Angel Labruna, Felix Loustau and Walter Gomez for an attacker position. Thus, in 1952 he took the opportunity to play again for Libertad. After competing without much success in the Copa Rio of 1952 Libertad went on to become runner-up in the national championship. In 1953 Libertad became again runner up in the championship, and players from the club made up the majority of the Paraguayan national team that in the same year won for the first time the South American Championship.