Defensa y Justicia continued its climb up the table, upsetting Newell's Old Boys 1-0 in the Argentine Primera Division.
Dario Franco's men made it back-to-back victories to move to 16th with 18 points from 16 matches - just six points behind seventh-placed Newell's.
Miguel Bertocchi was the provider of the winning goal at the Estadio Norberto Tito Tomaghello, releasing Brian Fernandez with a ball through played from inside his own half.
Fernandez did the rest, beating Newell's goalkeeper Oscar Ustari in a one-on-one to give the host the lead in the 71st minute.
Gustavo Raggio's visitors would have their chances to equalise, with Defensa down to 10 men four minutes after the goal when Javier Yacuzzi earned his second yellow card of the game.
Newell's best chance to capitalise on its numerical advantage came in the 84th minute, when Ciro Rius fouled former Sunderland attacker Ignacio Scocco in the area.
Scocco stepped up to take the spot kick, but Defensa keeper Diego Pellegrino kept out the effort to help his side to another upset victory.