Newell's Old Boys remain two points clear at the top of the Argentinian Apertura after drawing 0-0 at nearest rivals Racing Club.
Racing could have gone top with a win but neither side was able to break the deadlock.
That allowed ten-man Velez Sarsfield to close within three points of the league leaders thanks to a 1-0 win at Tigre.
Francisco Cerro was sent off after 69 minutes but the visitors shrugged off their numerical disadvantage to score the winner in the closing stages through Alejandro Cabral.
That also meant Belgrano Cordoba dropped to fourth in the standings as they lost 1-0 at All Boys, for whom Mauro Matos scored the only goal on 67 minutes.
At the bottom of the table, Union Santa Fe remain on three points after 11 games after losing 2-1 at home to San Martin San Juan.
Mauro Bogado (39) and Humberto Osorio (45) put San Martin in command and the home side only got on the scoresheet through a 90th-minute own goal from Lucas Landa.
The day's other game between Godoy Cruz and San Lorenzo finished goalless.