Unión beat Boca Juniors 1-0. Boca Juniors controlled the ball — 68% possession — but had nothing to show for it. Best on the pitch was S. Moyano, rated 7.7.

1. 0'
   ⚽Kick-off
   Copa de la Liga Profesional 2021
   ARG 5-4-1·3-4-2-1 ARG
   Coach: J. Azconzábal · M. RussoReferee: F. Espinoza📍 Estadio 15 de Abril
2. 1. First half
   2. 15'
      ARG
      Yellow card
      S. Villa
   3. 39'
      ARG
      Yellow card
      J. Garcia
   4. 39'
      ARG
      Yellow card
      N. Peñailillo
3. 1. Second half
   2. 46'
      ARG
      Substitution
      ▲F. Soldano▼Marcos Rojo
   3. 50'
      ARG
      GOOOAL!N. Peñailillo
   4. 53'
      ARG
      Substitution
      ▲M. Zárate▼Edwin Cardona
   5. 68'
      ARG
      Yellow card
      J. Campuzano
   6. 68'
      ARG
      Substitution
      ▲C. Medina▼Agustín Almendra
   7. 68'
      ARG
      Substitution
      ▲A. Varela▼J. Campuzano
   8. 69'
      ARG
      Substitution
      ▲F. Gerometta▼F. Vera
   9. 69'
      ARG
      Substitution
      ▲I. Machuca▼K. Zenon
   10. 74'
       ARG
       Substitution
       ▲F. Márquez▼J. Garcia
   11. 74'
       ARG
       Substitution
       ▲C. Corvalan▼N. Peñailillo
   12. 86'
       ARG
       Yellow card
       E. Canete
   13. 90+4'
       ARG
       Substitution
       ▲N. Leyes▼N. Acevedo