River Plate went top of the Argentinian Clausura table with a 2-1 win over struggling Colon Santa Fe on Sunday.
David Trezeguet gave River Plate the lead after 12 minutes and Leonardo Ponzio doubled the advantage 11 minutes before half-time.
River, after their fourth win in five matches, lead with 12 points from five matches. They are a point ahead of Godoy Cruz and two in front of Lanus, who can reclaim the lead with a win at home to Arsenal on Monday.
Emmanuel Gigliotti score a consolation goal for Colon with 15 minutes remaining.
Tigre lie fifth in the standings after beating mid-table San Lorenzo 1-0, Ruben Botta scoring the goal after 28 minutes.
Atletico Rafaela and Boca Juniors drew 1-1. Juan Eluchans gave Atletico the lead with a 27th-minute penalty but Nicolas Blandi netted with seven minutes to go to ensure the game ended in a draw.
