 In 1988 Mandiyú nearly qualified to Copa Libertadores playing a mini-tournament with San Lorenzo de Almagro.Both matches finished 1–1 but San Lorenzo passed to the next stage due to its best position in the Primera División tournament.Mandiyú achieved some notable performances during its third tenure on the Argentine top division, with notable victories over Boca Juniors (2–1), Independiente (3–0), Racing (4–3) and San Lorenzo (3–2).