After winning the final of the Torneo Apertura 2013, the club returns to the Copa Libertadores after their last participation in 1984, participated in the cup at Group 3 with Cerro Porteño, Deportivo Cali and Lanús. The first game was played against Lanús where the match ends 0–0 which highlighted the figure of Pedro Pablo Hernández due to its great performance and even the match he should have won the Rancagua. The second time he faced local to Deportivo Cali in the Estadio Monumental, game that Yerson Opazo effort to put the Colombian goalkeeper Faryd Mondragón and the ball enters the portal becoming the player that after 30 years back scoring in Copa Libertadores match ending 1–0 in favor of the "celestes". In the third received again this time local Cerro Porteño match was even for the locals who won 2–0 with goals of Eduardo Alejandro López from free kick and Luis Pedro Figueroa, but due to the expulsion of Braulio Leal lower the level of play and the Guarani tie the game with goals from Rodolfo Gamarra and Julio Dos Santos.