San Lorenzo beat Lanús 4-1. Santiago Martin scored 3 goals.

1. 0'
   ⚽Kick-off
   Primera División 1931 (LAF)
   Referee: Ricardo EspínolaAttendance: 2,000
2. 1. First half
   2. 1'
      ARG
      GOOOAL!SMSantiago Martin
   3. 2'
      ARG
      GOOOAL!AMAngel Montero
   4. 7'
      ARG
      GOOOAL!SMSantiago Martin
   5. 25'
      ARG
      GOOOAL!AAArturo Arrieta
3. 1. Second half
   2. 66'
      ARG
      GOOOAL!SMSantiago Martin