5 April 2018Lazio – Salzburg
Referee: Ovidiu Haţegan (ROU, photo)
Assistant Referee 1: Octavian Șovre (ROU)
Assistant Referee 2: Sebastian Gheorghe (ROU)
Additional AR 1: István Kovács (ROU)
Additional AR 2: Sebastian Colţescu (ROU)
Fourth Official: Radu Ghinguleac (ROU)
Referee Observer: Karen Nalbandyan (ARM)
Atlético de Madrid – Sporting
Referee: Sergei Karasev (RUS)
Assistant Referee 1: Anton Averianov (RUS)
Assistant Referee 2: Tikhon Kalugin (RUS)
Additional AR 1: Sergei Lapochkin (RUS)
Additional AR 2: Sergei Ivanov (RUS)
Fourth Official: Igor Demeshko (RUS)
Referee Observer: William Young (SCO)
Arsenal – CSKA Moskva
Referee: Pavel Královec (CZE)
Assistant Referee 1: Roman Slyško (SVK)
Assistant Referee 2: Ivo Nádvorník (CZE)
Additional AR 1: Petr Ardeleánu (CZE)
Additional AR 2: Karel Hrubeš (CZE)
Fourth Official: Jan Paták (CZE)
Referee Observer: Manuel Mejuto González (ESP)
RB Leipzig – Olympique de Marseille
Referee: Alberto Undiano Mallenco (ESP)
Assistant Referee 1: Roberto Alonso Fernández (ESP)
Assistant Referee 2: Juan Carlos Yuste Jiménez (ESP)
Additional AR 1: Juan Martínez Munuera (ESP)
Additional AR 2: José Sánchez Martínez (ESP)
Fourth Official: Raúl Cabañero Martínez (ESP)
Referee Observer: Darko Čeferin (SVN)
