ACF Fiorentina – Club Brugge
Referee: Michael Oliver ENG (photo)
Assistant Referee 1: Stuart Burt ENG
Assistant Referee 2: Daniel Cook ENG
Fourth Official: Andrew Madley ENG
VAR: Christopher Kavanagh ENG
AVAR: Jarred Gillett ENG
Referee Observer: Alexandru Deaconu ROU
Aston Villa – Olympiakos
Referee: Marco Guida ITA
Assistant Referee 1: Filippo Meli ITA
Assistant Referee 2: Giorgio Peretti ITA
Fourth Official: Donatas Rumšas LTU
VAR: Paolo Valeri ITA
AVAR: Massimiliano Irrati ITA
Referee Observer: Herbert Fandel GER