|Referee: Jana Adámková (CZE) – Stadium: Otoka, Sarajevo (BIH)|
|Referee: Alexandra Ihringova (ENG) – Stadium: ISS, Vantaa (FIN)|
|Referee: Aneliya Sinabova (BUL) – Stadium: Cluj Arena, Cluj-Napoca (ROU)|
|Referee: Christina Westrum Pedersen (NOR) – Stadium: Seaview, Belfast (NIR)|
|Referee: Vesna Budimir (CRO) – Stadium: Asim Ferhatović Hase Stadion, Sarajevo (BIH)|
|Referee: Paloma Quintero Siles (ESP) – Stadium: ISS, Vantaa (FIN)|
|Referee: Carina Vitulano (ITA) – Stadium: Paphiakos Stadium, Paphos (CYP)|
|Referee: Esther Azzopardi (MLT) – Stadium: Municipal, Fatima (POR)|
|Referee: Sara Persson (SWE) – Stadium: Municipal, Torres Novas (P) (POR)|
|Referee: Zuzana Kováčová (SVK) – Stadium: Sportni Park, Beltinci (SVN)|
|Referee: Gyöngyi Gaál (HUN) – Stadium: Cluj Arena, Cluj-Napoca (ROU)|
|Referee: Linn Andersson (SWE) – Stadium: Sportpark Slangenbeek, Hengelo (NED)|
|Referee: Ivana Vlaić (BIH) – Stadium: FC Twente Stadion, Enschede (NED)|
|Referee: Knarik Grigoryan (ARM) – Stadium: Paphiakos Stadium, Paphos (CYP)|
|Referee: Lilach Asulin (ISR) – Stadium: Seaview, Belfast (NIR)|
|Referee: Pernilla Larsson (SWE) – Stadium: Športni park, Lendava (SVN)|
Last updated: 19/03/2018 17:57 CET
The UEFA Women's Champions League comprises a qualifying group stage, four rounds of two-legged knockout ties and a one-off final.
The lower-ranked champion clubs compete in four-team, one-venue mini-tournaments hosted by one of the participants.
The qualifying round winners join the teams given a bye past that stage in the round of 32. From here on the competition consists of two-legged knockout ties, continuing with the round of 16, quarter-finals and semi-finals played over two legs. If scores are level after 90 or 120 minutes of the second leg, the team with the most away goals wins, otherwise a penalty shoot-out is held.
The final is on 1 June at Cardiff City Stadium, two days before the men's final at the National Stadium of Wales.
Further details, including the criteria for separating teams that finish level on points in a group, can be found in the official competition regulations.