24 April 2018 FC Liverpool – AS Roma Referee: Felix Brych (GER, photo) Assistant Referee 1: Mark Borsch (GER) Assistant Referee 2: Stefan Lupp (GER) Additional AR 1: Bastian Dankert (GER) Additional AR 2: Marco Fritz (GER) Fourth Official: Markus Häcker (GER) Referee Observer: Juan Fernandez Marín (ESP)
25 April 2018 Bayern München – Real Madrid Referee: Bjorn 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: Sandor Piller (HUN)
24 April 2018