San Lorenzo beat Oriente Petrolero 4-0. Ruben H. Ayala scored 2 goals.

1. 0'
   ⚽Kick-off
   CONMEBOL Libertadores 1973
   Referee: Ramón Barreto📍 GasómetroAttendance: 18,000
2. 1. First half
   2. 3'
      ARG
      GOOOAL!RARuben H. Ayala
   3. 15'
      ARG
      GOOOAL!PGPedro A. González
3. 1. Second half
   2. 87'
      ARG
      GOOOAL!RHRamon HerediaPenalty
   3. 89'
      ARG
      GOOOAL!RARuben H. Ayala