Overview
- Eight clubs will contest the second promotion berth to the 2026 Liga Profesional after Gimnasia de Mendoza clinched the direct ascent.
- The first legs run Oct. 19–21: Gimnasia y Tiro vs Estudiantes RC Saturday 22:00; Gimnasia de Jujuy vs Deportivo Madryn Sunday 14:45; Deportivo Morón vs Atlanta Sunday 17:00; Tristán Suárez vs Estudiantes (Caseros) Monday 19:00.
- Quarterfinals are two-legged with no extra time or penalties, and aggregate ties favor the team better placed in the season table under the ventaja deportiva rule.
- Deportivo Madryn opens away to Gimnasia de Jujuy on Sunday, with the return planned the following week at Abel Sastre in Puerto Madryn; exact return-leg dates are not yet confirmed.
- The bracket sets the Gimnasia de Jujuy–Deportivo Madryn winner to face the Atlanta–Deportivo Morón winner in the semifinals.