Arsenal Sarandi failed to take advantage of a slip-up by Argentinian Apertura leader Newell's Old Boys as it was held to a 1-1 draw by Gimnasia La Plata in a match which saw five players sent off in a mass brawl.
Arsenal appeared to be on its way to a victory which would have put it one point off the top when
The match finished in heated fashion after a dispute about the state of the ball and what the home side saw as time-wasting.
The referee was forced to halt the match as police came on the pitch to attempt to break things up, and in the end
Newell's, meanwhile, surrendered a lead to draw 1-1 with
Boca Juniors moved level on 24 points with Arsenal as it beat Colon Santa Fe 2-0 with two quickfire first-half goals.
In the day's other game,
Central Coast Mariners has been eliminated from the AFC Champions League after a 1-0 loss to Sanfrecce Hiroshima in Japan.