High-flying sides Tigre and Estudiantes could not be separated as they drew 1-1 in the Clausura.
Estudiantes, third in the table, went ahead through Mauro Boselli after 18 minutes but Diego Morales levelled from the spot ten minutes later.
Second-placed Velez Sarsfield also drew, 3-3 at Union Santa Fe, meaning the top three remained as they were. It could have been better for Velez as they threw away a 3-1 lead.
Rodrigo Erramuspe put Union ahead after 19 minutes, but Juan Manuel Martinez equalised with a penalty before goals either side of half-time from Ivan Bella and Federico Insua put the visitors in control. Erramuspe, though, pulled one back after 65 minutes and Pablo Magnin equalised ten minutes from time.
Independiente got their second win of the Clausura, but they left it late as goals from Ernesto Farias and Fabian Monserrat in the 76th and 87th minutes saw them beat Belgrano Cordoba 2-0.
Ten-man Olimpo could not hold on as they slipped to a 3-0 home defeat against Racing Club. Olimpo were up against it when Cristian Villanueva was sent off in just the 14th minute, but they clung on until the hour mark when Federico Mancinelli scored an own goal.
That seemed to demoralise the home side and Racing took advantage with further goals from Gabriel Hauche and Lucas Castroman.
