River Plate had to settle for a point for the fifth Argentina Apertura match in a row as they had to come from behind to draw 1-1 with Racing Club at the Estadio Monumental.
The Buenos Aires giants fell behind to Giovanni Moreno's 34th-minute goal but equalised a minute into the second period through Diego Buonanotte.
The result leaves River in eighth, a point above Racing, who climbed above Lanus as they lost 2-1 at home to Colon Santa Fe.
Joaquin Larrivey put Colon ahead in the 39th minute and Damian Diaz added a second five minutes into the second period before Lanus halved the deficit through Silvio Romero (66).
Argentinos Juniors moved within a point of All Boys as they beat them 1-0 with an 81st-minute Franco Niell goal, while Quilmes remain bottom without a win to their name following a 2-0 home defeat to Banfield, who lead a clutch of teams on 18 points and sit fifth in the standings.