CONMEBOL Libertadores 2021 – Quarter-finals (Second Leg)

17-19 August 2021

Palmeiras – Sao Paulo
Referee: Wilmar Roldan (COL, photo)
Assistant Referee 1: Dionisio Ruiz (COL)
Assistant Referee 2: Wilmar Navarro (COL)
Fourth Official: Carlos Ortega (COL)
VAR: Julio Bascunan (CHI)
AVAR 1: Juan Lara (CHI)
AVAR 2: Raul Orellana (CHI)
Referee Assessor: Silvia Regina (BRA)
VAR Observer: Luis Sanchez (VEN)

Flamengo – Olimpia
Referee: Jesus Valenzuela (VEN)
Assistant Referee 1: Tulio Moreno (VEN)
Assistant Referee 2: Lubin Torrealba (VEN)
Fourth Official: Orlando Bracamonte (VEN)
VAR: John Ospina (COL)
AVAR 1: Carlos Betancur (COL)
AVAR 2: Alexander Guzman (COL)
Referee Assessor: Hilton Moutinho (BRA)
VAR Observer: Jose Buitrago (COL)

Atletico Mineiro – River Plate
Referee: Roberto Tobar (CHI)
Assistant Referee 1: Christian Schiemann (CHI)
Assistant Referee 2: Claudio Rios (CHI)
Fourth Official: Kevin Ortega (PER)
VAR: Andres Cunha (URU)
AVAR 1: Gustavo Tejera (URU)
AVAR 2: John Leon (COL)
Referee Assessor: Sergio Cristiano (BRA)
VAR Observer: Enrique Caceres (PAR)

Barcelona – Fluminense
Referee: Esteban Ostojich (URU)
Assistant Referee 1: Carlos Barreiro (URU)
Assistant Referee 2: Pablo Llarena (URU)
Fourth Official: Jose Argote (VEN)
VAR: Victor Carrillo (PER)
AVAR 1: Piero Maza (CHI)
AVAR 2: Jonny Bossio (PER)
Referee Assessor: Omar Ponce (ECU)
VAR Observer: Ubaldo Aquino (PAR)