Referee: Esteban Ostojich (URU, photo)
Assistant Referee 1: Carlos Barreiro (URU)
Assistant Referee 2: Martin Soppi (URU)
Fourth Official: Gery Vargas (BOL)
VAR: Mauro Vigliano (ARG)
AVAR 1: Facundo Tello (ARG)
AVAR 2: Alexander Guzman (COL)
Referee Assessor: Omar Ponce (ECU)
Brazil – Chile
Referee: Patricio Loustau (ARG)
Assistant Referee 1: Ezequiel Brailovsky (ARG)
Assistant Referee 2: Gabriel Chade (ARG)
Fourth Official: Guillermo Guerrero (ECU)
VAR: Andres Cunha (URU)
AVAR 1: Daniel Fedorczuk (URU)
AVAR 2: Christian Lescano (ECU)
Referee Assessor: Amelio Andino (PAR)
3 July 2021
Uruguay – Colombia
Referee: Jesus Gil Manzano (ESP)
Assistant Referee 1: Diego Barbero Sevilla (ESP)
Assistant Referee 2: Angel Nevado Rodriguez (ESP)
Fourth Official: Eber Aquino (PAR)
VAR: Ricardo De Burgos Bengoetxea (ESP)
AVAR 1: Jose Munuera Montero (ESP)
AVAR 2: Milciades Saldivar (PAR)
Referee Assessor: Enrique Caceres (PAR)
Argentina – Ecuador
Referee: Wilton Sampaio (BRA)
Assistant Referee 1: Danilo Manis (BRA)
Assistant Referee 2: Bruno Pires (BRA)
Fourth Official: Victor Carrillo (PER)
VAR: Wagner Reway (BRA)
AVAR 1: Rafael Traci (BRA)
AVAR 2: Eduardo Cardozo (PAR)
Referee Assessor: Emerson Carvalho (BRA)