Boca Juniors went top of the Clausura table with a 2-0 win at Racing Club.
Boca left it late, as goals from half-time substitute Lucas Viatri in the 70th minute and Nicolas Blandi eight minutes from time sealed the victory.
With 15 games played, the result left Boca one point ahead of Tigre and Newell's All Boys, and two ahead of All Boys.
Colon Santa Fe were held to a 0-0 draw at Atletico Rafaela, while Velez Sarsfield slipped to a 1-0 home defeat against Belgrano Cordoba, Andres Silvera netting in the 63rd minute.
Olimpo lifted themselves off the foot of the table with just their third Clausura win, 2-1 over Independiente. Nestor Bareiro scored both their goals, in the eighth and 69th minutes, sandwiching Ernesto Farias' 20th-minute reply.