Colon Santa Fe moved to fourth in the Apertura as they claimed a 1-0 win at Olimpo on Monday.
Ivan Moreno y Fabianesi scored the only goal of the game three minutes after the break as his side moved on to seven points after three games, alongside four other teams.
Union Santa Fe and Belgrano Cordoba shared a goalless draw in a game the visitors finished with nine men following two sendings-off.
Nestor Silvera was sent off eight minutes before half-time with Juan Quiroga getting his marching orders 20 minutes from time.
