Lanus jumped into second place in the Apertura after Newell's Old Boys was held to a goalless draw away to Boca Juniors.
Lanus was a 2-1 winner over San Martin San Juan to move level on points with Old Boys, snatching second on goal difference.
Lanus and Old Boys sit three points behind leader
Racing Club is three points further back after a 49th-minute strike from
Arsenal Sarandi added to the woes of struggling Tigre with a 1-0 win courtesy of a
San Lorenzo failed to seal the Argentina Primera Division title after a 0-0 draw against Estudiantes on Monday (AEDT).