Olimpo moved a point clear at the top of the Argentinian Clausura on Sunday with a 2-0 win at Boca Juniors.
Martin Rolle set the visitors on their way with the opener six minutes before half-time and Federico Dominguez made sure of the result by bagging the second goal a minute from time.
Olimpo claimed top spot courtesy of Estudiantes' 1-0 win at Racing Club, who slipped to second. Hernan Lopez grabbed the game's only goal in the 84th minute to lift Estu up to third.
Argentinos Juniors also secured an away win - 2-0 at second-bottom Newell's Old Boys. Ciro Rius gave the visitors the perfect start with a fifth-minute strike and substitute Mauro Bogado doubled their advantage 11 minutes from the end.
Finally, the match between Velez Sarsfield and fourth-placed San Lorenzo was abandoned after 17 minutes due to crowd trouble.