UEFA Europa League 2020/2021 – Semi-finals (First Leg)

29 April 2021

Manchester United – AS Roma

Referee: Carlos Del Cerro Grande (ESP, photo)
Assistant Referee 1: Juan Yuste Jimenez (ESP)
Assistant Referee 2: Roberto Alonso Fernandez (ESP)
Fourth Official: Jesus Gil Manzano (ESP)
VAR: Alejandro Hernandez Hernandez (ESP)
AVAR: Ricardo De Burgos Bengoetxea (ESP)
Referee Observer: Pascal Garibian (FRA)

Villarreal – Arsenal
Referee: Artur Soares Dias (POR)
Assistant Referee 1: Rui Tavares (POR)
Assistant Referee 2: Paulo Soares (POR)
Fourth Official: Tiago Martins (POR)
VAR: Joao Pinheiro (POR)
AVAR: Luis Godinho (POR)
Referee Observer: Murat Ilgaz (TUR)