BUENOS AIRES — Emmanuel Gigliotti scored a late winner as Boca Juniors snatched a 1-0 victory over Belgrano in the second round of Argentina's first division.
Reigning champion River Plate - Boca's biggest rival - also won on Sunday, overcoming Rosario 2-0, while Racing beat Copa Libertadores holder San Lorenzo 2-0.
Federico Carrizo came close to scoring for Boca Juniors when he hit the bar in the 28th minute, but the breakthrough didn't come until the last minute of second half injury time when Gigliotti headed in the decisive winner.
Teofilo Gutierrez scored from the edge of the penalty area for River Plate in the 17th, after a 35-yard (meter) pass from Rodrigo Mora. River's second came via Leonardo Pisculichi, who struck a powerful left foot shot from a tight angle in the 79th.
Luciano Lollo netted for Racing Club on the stroke of half time, and Facundo Castillon doubled the score in the 92nd.
On Saturday, Jonathan Blanco scored both first half penalties in Olimpo's 2-1 victory over Tigre, Banfield lost 2-3 to Defensa y Justicia, Velez Sarsfield beat Arsenal 2-1 and Estudiantes secured a 1-0 victory against Independiente.
On Friday, Newell's Old Boys drew 1-1 with Gimnasia.
The final two games of the second round take place on Monday when Quilmes face Godoy Cruz and Atletico Rafaela play Lanus.