Lanus missed the chance to go clear at the top of the Apertura standings with a goalless draw at San Martin San Juan on Saturday.
A share of the spoils was still enough to move them level with Velez Sarsfield
on seven points but they might have hoped for more.
San Lorenzo did win, 3-1 at home to Argentinos Juniors, to go third.
Emmanuel Gigliotti (25) and Juan Jose Morales (68) traded goals to level
matters until Bernardo Romeo and Emiliano Tellechea struck in the last 11
minutes to take the points.
Independiente beat Estudiantes 1-0 despite losing Matias De Federico and
Adrian Argacha to red cards. Substitute Marco Perez scored the winner in the 46th minute.