Concacaf Champions League 2021 – Quarter-finals (Second Leg)

4-5 May 2021

Philadelphia Union – Atlanta United
Referee: Armando Villarreal (USA, photo)
Assistant Referee 1: Corey Parker (USA)
Assistant Referee 2: Logan Brown (USA)
Fourth Official: Ted Unkel (USA)
VAR: Edvin Jurisevic (USA)
AVAR: Tim Ford (USA)

Cruz Azul – Toronto FC
Referee: Said Martinez (HON)
Assistant Referee 1: Walter Lopez (HON)
Assistant Referee 2: Christian Ramirez (HON)
Fourth Official: Selvin Brown (HON)
VAR: Carlos Ayala (MEX)
AVAR: Tatiana Guzman (NCA)

CF Monterrey – Columbus Crew
Referee: Daneon Parchment (JAM)
Assistant Referee 1: Ojay Duhaney (JAM)
Assistant Referee 2: Damian Williams (JAM)
Fourth Official: Oshane Nation (JAM)
VAR: Erick Miranda (MEX)
AVAR: Benjamin Pineda (CRC)

Club America – Portland Timbers
Referee: Ivan Barton (SLV)
Assistant Referee 1: Juan Zumba (SLV)
Assistant Referee 2: Geovany Garcia (SLV)
Fourth Official: Jose Torres (PUR)
VAR: Arturo Cruz (MEX)
AVAR: Melissa Borjas (HON)