San Lorenzo beat Unión 2-1. San Lorenzo played with ten from minute 31.

1. 0'
   ⚽Kick-off
   Primera División 1990/91
   Referee: Pasturenzi📍 Ferro Carril OesteAttendance: 3,957
2. 1. First half
   2. 28'
      ARG
      GOOOAL!JRJorge R. Rinaldi
   3. 31'
      ARG
      Red card
      RIRiquelme
   4. 40'
      ARG
      GOOOAL!CBClaudio D. Borghi
   5. 45'
      ARG
      Red card
      TOTomé
3. 1. Second half
   2. 53'
      ARG
      GOOOAL!MVMario Hernán Videla