Pedro Ramirez scored a second-half winner as Deportivo Riestra clinched a 2-1 away victory over River Plate in Argentina's Primera Division on Sunday.

Antony Alonso gave Riestra the lead by heading home from Pablo Monje's cross but Giuliano Galoppo equalized shortly after, smashing a volley that beat goalkeeper Ignacio Arce at his near post.

Monje was again the provider as Pedro Ramirez restored the visitors' lead with a low finish on the turn in the 51st minute.

The hosts played the last 15 minutes with only 10 men after Maximiliano Salas was shown a straight red card for offensive language toward a linesman.

Deportivo Riestra now leads the 15-team Group B with 22 points, four ahead of second-placed River.

In other Primera Division fixtures on Sunday, Independiente drew 0-0 at Racing, Instituto was held to a goalless home draw by Lanus while Independiente Rivadavia's home clash with Huracan also ended in a 0-0 stalemate.