Atletico de Madrid – Arsenal Referee: Gianluca Rocchi (ITA, photo) Assistant Referee 1: Elenito Di Liberatore (ITA) Assistant Referee 2: Mauro Tonolini (ITA) Additional AR 1: Paolo Valeri (ITA) Additional AR 2: Massimiliano Irrati (ITA) Fourth Official: Alessandro Costanzo (ITA) Referee Observer: Jaap Uilenberg (NED)
FC Salzburg – Olympique de Marseille Referee: Sergei Karasev (RUS) Assistant Referee 1: Anton Averianov (RUS) Assistant Referee 2: Tikhon Kalugin (RUS) Additional AR 1: Sergey Lapochkin (RUS) Additional AR 2: Sergei Ivanov (RUS) Fourth Official: Igor Demeshko (RUS) Referee Observer: Eugen Strigel (GER)
3 May 2018