Atletico Tucuman pulled off a major upset by defeating River Plate 2-0 at home in the Argentine Division 1 on September 21, 2025. The stunning result at the Estadio Monumental José Fierro saw the hosts execute a perfect game plan to nullify one of the league's giants and secure a famous victory. Atletico Tucuman scored early in both halves to stun the visitors; the first came from a defensive error pounced upon by their forward, and the second was a clinical finish on a counter-attack. River Plate dominated possession but found it impossible to break down a resolute and physically committed Tucuman defense, with their few chances being blocked or saved. The key performance was from the Tucuman goalkeeper, who made a series of outstanding saves to preserve his clean sheet, including a remarkable double stop in the second half. This victory provided a massive boost to Tucuman's survival hopes and served as a shock defeat for River Plate's title ambitions. The River Plate manager criticized his team's lack of intensity, while the jubilant Tucuman coach called it a historic night for the club.