UEFA Women's Champions League – Semi-finals (First Leg)

22 April 2018

Manchester City – Olympique Lyonnais
Referee: Bibiana Steinhaus (GER, photo)
Assistant Referee 1: Katrin Rafalski (GER)
Assistant Referee 2: Chrysoula Kourompylia (GRE)
Fourth Official: Riem Hussein (GER)
Referee Observer: Ingrid Jonsson (SWE)

Chelsea LFC – VfL Wolfsburg
Referee: Esther Staubli (SUI)
Assistant Referee 1: Belinda Brem (SUI)
Assistant Referee 2: Susann Küng (SUI)
Fourth Official: Désirée Grundbacher (SUI)
Referee Observer: Antonia Kokotou (GRE)