BUENOS AIRES, June 3 - A late Ruben Ramirez goal helped struggling Colon to a 2-1 win over Boca Juniors on Sunday and left San Lorenzo on the brink of the Argentine championship title.

Colon gave a battling performance to allay their relegation fears, deservedly taking the lead on 37 minutes with a goal by Colombian midfielder Freddy Grisales.

Mauro Boselli equalised for Boca before the interval but Ramirez sealed the victory with three minutes remaining.

Boca started several first-choice players on the bench with one eye on Wednesday's Libertadores Cup game against Colombia's Cucuta.

San Lorenzo drew 1-1 draw at Argentinos Juniors on Saturday and are now within sight of their first Argentine title win since 2001.

A headed goal by defender Cristian Tula gave San Lorenzo the lead on 24 minutes but Sebastian Carrera forced a second-half equaliser following a goalmouth scramble.

The results left San Lorenzo on 39 points, four ahead of Boca Juniors with two games remaining each.

Third-placed Estudiantes have lost their momentum since midfield general Juan Sebastian Veron was sidelined by injury, and the La Plata club crashed to a 2-0 defeat at Racing Club on Sunday.

A first-half penalty save by Mariano Andujar was not enough to hold Racing at bay, and Estudiantes now trail San Lorenzo by six points.

Nuevo Chicago's relegation fears deepened following their 2-1 defeat at Velez Sarsfield.

Belgrano forced a 1-1 draw at Lanus but remained second bottom, ahead of relegated Quilmes.

River Plate's home match with Godoy Cruz will be played at a neutral venue on Monday as punishment for incidents of hooliganism involving supporters at the Monumental stadium.