Atlético Tucumán overcame Peñarol, 1x0, on Wednesday, in a match relating to the Grp.3 of Copa Libertadores.
The first half came to an end without goals.
Leandro Díaz scored the winning goal in the 59th minute with a left-foot shot inside the box.
In the next fixture, Atlético Tucumán visit Libertad. Meanwhile, Peñarol will host The Strongest.