Unión and Deportivo Mandiyú drew 1-1. Deportivo Mandiyú played with ten from minute 17.

1. 0'
   ⚽Kick-off
   Primera División 1989/90
   Referee: CrespiAttendance: 2,680
2. 1. First half
   2. 15'
      ARG
      GOOOAL!JCJosé Antonio Castro
   3. 17'
      ARG
      Red card
      PBPedro Daniel Barrios
3. 1. Second half
   2. 89'
      ARG
      GOOOAL!CPCésar Javier Vega Perrone