Two goals in the space of five minutes saw Colon Santa Fe come from behind late on to win 2-1 at Arsenal Sarandi in its Apertura opener.
The hosts had led through Guillermo Burdisso's 35th minute opener, but Tomas Costa levelled in the 73rd minute and Esteban Fuertes grabbed what proved to be the winner moments later.
Godoy Cruz finished with 10 men as they got their campaign under way with a 1-1 draw against Velez Sarsfield.
Godoy led through Ruben Ramirez's 34th minute goal, but Nicolas Sanchez wassent off six minutes later.
The extra man eventually told in the 66th minute with Ivan Bella's equaliser earning a share of the points.
The match between All Boys and Belgrano Cordoba also finished in a 1-1 draw.
Cesar Pereyra put Belgrano ahead a minute into the second half, but Facundo Quiroga levelled in the 54th minute.
