The Paraguayan forward Gabriel Ávalos from Patronato prevented Gimnasia y Esgrima La Plata, led by Diego Maradona, from achieving a valuable victory for their permanence in the First Division with a goal six minutes before the end.
Gimnasia took the lead in the score four minutes into the game with a goal from the defender Paolo Goltz.
The match, balanced and intense, was played because both teams are in the relegation zone and needed a victory to fight for survival.
In the play prior to Ávalos' goal, Gimnasia had a penalty in their favor, but Lucas Barrios missed it.
"We missed the penalty and left ourselves open," said Maradona just after the match.
The nineteenth round of the Argentine Superliga will conclude this Monday.