12 April 2018Sporting CP – Atlético de Madrid
Referee: Milorad Mažić (SRB, photo)
Assistant Referee 1: Milovan Ristić (SRB)
Assistant Referee 2: Dalibor Djurdjević (SRB)
Additional AR 1: Nenad Djokić (SRB)
Additional AR 2: Danilo Grujić (SRB)
Fourth Official: Nemanja Petrović (SRB)
Referee Observer: Herbert Fandel (GER)
Salzburg – Lazio
Referee: Damir Skomina (SVN)
Assistant Referee 1: Jure Praprotnik (SVN)
Assistant Referee 2: Robert Vukan (SVN)
Additional AR 1: Matej Jug (SVN)
Additional AR 2: Slavko Vinčič (SVN)
Fourth Official: Tomaž Klančnik (SVN)
Referee Observer: Markus Nobs (SUI)
CSKA Moskva – Arsenal
Referee: Felix Zwayer (GER)
Assistant Referee 1: Thorsten Schiffner (GER)
Assistant Referee 2: Marco Achmüller (GER)
Additional AR 1: Daniel Siebert (GER)
Additional AR 2: Sascha Stegemann (GER)
Fourth Official: Rafael Foltyn (GER)
Referee Observer: Murat Ilgaz (TUR)
Olympique de Marseille – RB Leipzig
Referee: Björn Kuipers (NED)
Assistant Referee 1: Sander van Roekel (NED)
Assistant Referee 2: Erwin Zeinstra (NED)
Additional AR 1: Pol van Boekel (NED)
Additional AR 2: Dennis Higler (NED)
Fourth Official: Charles Schaap (NED)
Referee Observer: Luciano Luci (ITA)
