CONMEBOL Libertadores 2021 – Round of 16 (Second Leg)

20-22 July 2021

Atletico Mineiro – Boca Juniors
Referee: Esteban Ostojich (URU, photo)
Assistant Referee 1: Carlos Barreiro (URU)
Assistant Referee 2: Martin Soppi (URU)
Fourth Official: Angelo Hermosilla (CHI)
VAR: Julio Bascunan (CHI)
AVAR: Raul Orellana (CHI)
Referee Assessor: Hilton Moutinho (BRA)
VAR Observer: Wilson Lamouroux (COL)

Fluminense – Cerro Porteno
Referee: Wilmar Roldan (COL)
Assistant Referee 1: Sebastian Vela (COL)
Assistant Referee 2: Dionisio Ruiz (COL)
Fourth Official: Carlos Ortega (COL)
VAR: John Ospina (COL)
AVAR: David Rodriguez (COL)
Referee Assessor: Sergio Cristiano (BRA)
VAR Observer: Jorge Jaimes (PER)

Racing – Sao Paulo
Referee: Gustavo Tejera (URU)
Assistant Referee 1: Eduardo Cardozo (PAR)
Assistant Referee 2: Milciades Saldivar (PAR)
Fourth Official: Daniel Fedorczuk (URU)
VAR: Eber Aquino (PAR)
AVAR: Victor Carrillo (PER)
Referee Assessor: Ricardo Casas (ARG)
VAR Observer: Ubaldo Aquino (PAR)

Barcelona – Velez Sarsfield

Referee: Piero Maza (CHI)
Assistant Referee 1: Christian Schiemann (CHI)
Assistant Referee 2: Claudio Rios (CHI)
Fourth Official: Bismasks Santiago (COL)
VAR: Juan Lara (CHI)
AVAR: Alexander Guzman (COL)
Referee Assessor: Wilson Avila (ECU)
VAR Observer: Luis Sanchez (VEN)

Palmeiras – Universidad Catolica
Referee: Alexis Herrera (VEN)
Assistant Referee 1: Carlos Lopez (VEN)
Assistant Referee 2: Jorge Urrego (VEN)
Fourth Official: Orlando Bracamonte (VEN)
VAR: John Ospina (COL)
AVAR: David Rodriguez (COL)
Referee Assessor: Roberto Perassi (BRA)
VAR Observer: Jose Buitrago (COL)

Argentinos Juniors – River Plate
Referee: Eber Aquino (PAR)
Assistant Referee 1: Eduardo Cardozo (PAR)
Assistant Referee 2: Milciades Saldivar (PAR)
Fourth Official: Gery Vargas (BOL)
VAR: Diego Haro (PER)
AVAR: Victor Carrillo (PER)
Referee Assessor: Ricardo Casas (ARG)
VAR Observer: Freddy Arellanos (PER)

Flamengo – Defensa y Justicia
Referee: Roberto Tobar (CHI)
Assistant Referee 1: Alejandro Molina (CHI)
Assistant Referee 2: Sebastian Vela (COL)
Fourth Official: Wilmar Roldan (COL)
VAR: Cristian Garay (CHI)
AVAR: Nicolas Gamboa (CHI)
Referee Assessor: Nilson Moncao (BRA)
VAR Observer: Jose Carpio (ECU)

Internacional – Olimpia
Referee: Christian Ferreyra (URU)
Assistant Referee 1: Pablo Llarena (URU)
Assistant Referee 2: Alberto Ponte (VEN)
Fourth Official: Jose Argote (VEN)
VAR: Julio Bascunan (CHI)
AVAR: Cristian Garay (CHI)
Referee Assessor: Paolo Conceicao (BRA)
VAR Observer: Roberto Silvera (URU)