Argentinos Juniors lie fifth in the Argentinian Torneo Clausura after a 2-1 win away at Colon Santa Fe.
Nicolas Blandi and Franco Niell scored the goals to put the away side ahead before Ivan Moreno y Fabianesi replied.
German Basueldo was then sent off for the visitors but the ten men held on to win.
Ten-man Banfield won 3-1 at Racing Club with the goals coming from Facundo Ferreira, Gustavo Toledo and substitute Maximiliano Bustos.
Mauro Dos Santos scored an own goal and the visitors also had Victor Lopez sent off.
Juan Salgueiro earned San Lorenzo a point in a 1-1 draw with Arsenal Sarandi, who had led through Adrian Gonzalez.
Substitute Agustin Torassa scored the only goal with two minutes remaining as All Boys won 1-0 at home to Quilmes.