Fiorentina – Hearts
Referee: Ivan Bebek (CRO, photo)
Assistant Referee 1: Goran Pataki (CRO)
Assistant Referee 2: Luka Pajić (CRO)
Fourth Official: Patrik Kolarić (CRO)
Referee Observer: Giorgi Vadachkoria (GEO)
Istanbul Basaksehir – RFS
Referee: Philip Farrugia (MLT)
Assistant Referee 1: Alan Camilleri (MLT)
Assistant Referee 2: Duncan Sultana (MLT)
Fourth Official: Ishmael Barbara (MLT)
Referee Observer: Rusmir Mrković (BIH)
Austria Wien – Villarreal
Referee: Georgi Kabakov (BUL)
Assistant Referee 1: Martin Margaritov (BUL)
Assistant Referee 2: Diyan Valkov (BUL)
Fourth Official: Ivaylo Stoyanov (BUL)
Referee Observer: Sokol Jareci (ALB)
Partizan – Köln
Referee: Roi Reinshreiber (ISR)
Assistant Referee 1: David Bitton (ISR)
Assistant Referee 2: Sagy Metzamber (ISR)
Fourth Official: Erez Papir (ISR)
Referee Observer: Alieh Čykun (BLR)
Apollon – AZ Alkmaar
Referee: Morten Krogh (DEN)
Assistant Referee 1: Dennis Rasmussen (DEN)
Assistant Referee 2: Jesper Dahl (DEN)
Fourth Official: Mikkel Redder (DEN)
Referee Observer: Ichko Lozev (BUL)
Djurgarden – Gent
Referee: Manfredas Lukjančukas (LTU)
Assistant Referee 1: Vytenis Kazlauskas (LTU)
Assistant Referee 2: Dainius Raudys (LTU)
Fourth Official: Mindaugas Jackus (LTU)
Referee Observer: Alain Hamer (LUX)
CFR Cluj – Slavia Praha
Referee: Luis Godinho (POR)
Assistant Referee 1: Rui Teixeira (POR)
Assistant Referee 2: Pedro Almeida (POR)
Fourth Official: Miguel Nogueira (POR)
Referee Observer: Stephen Tanner (ENG)
Slovan Bratislava – Basel
Referee: Serhiy Boiko (UKR)
Assistant Referee 1: Viktor Matyash (UKR)
Assistant Referee 2: Valentyn Kutsev (UKR)
Fourth Official: Viktor Kopiievskyi (UKR)
Referee Observer: Asim Xudiyev (AZE)
FCSB – Silkeborg
Referee: Nicholas Walsh (SCO)
Assistant Referee 1: Graeme Stewart (SCO)
Assistant Referee 2: Calum Spence (SCO)
Fourth Official: Alain Muir (SCO)
Referee Observer: Martin Hansson (SWE)
West Ham – Anderlecht
Referee: Willy Delajod (FRA)
Assistant Referee 1: Erwan Finjean (FRA)
Assistant Referee 2: Philippe Jeanne (FRA)
Fourth Official: Thomas Leonard (FRA)
Referee Observer: John Ward (IRL)
Hapoel Beer Sheva – Lech
Referee: Ruddy Buquet (FRA)
Assistant Referee 1: Cyril Gringore (FRA)
Assistant Referee 2: Guillaume Debart (FRA)
Fourth Official: Bastien Dechepy (FRA)
Referee Observer: Miroslav Tulinger (CZE)
Nice – Slovacko
Referee: Iwan Griffith (WAL)
Assistant Referee 1: Lewiss Edwards (WAL)
Assistant Referee 2: Johnathan Bryant (WAL)
Fourth Official: Bryn Markham-Jones (WAL)
Referee Observer: Orhan Erdemir (TUR)
Vaduz – Dnipro
Referee: Marian Barbu (ROU)
Assistant Referee 1: Cristian Orbulet (ROU)
Assistant Referee 2: Imre Bucsi (ROU)
Fourth Official: Lucian Rusandu (ROU)
Referee Observer: Elmir Pilav (BIH)
Shamrock Rovers – Molde
Referee: Dario Bel (CRO)
Assistant Referee 1: Marjan Tomas (CRO)
Assistant Referee 2: Kruno Šaric (CRO)
Fourth Official: Tihomir Pejin (CRO)
Referee Observer: Lassin Isaksen (FRO)
Ballkani – Sivasspor
Referee: Manuel Schuttengruber (AUT)
Assistant Referee 1: Roland Brandner (AUT)
Assistant Referee 2: Robert Steinacher (AUT)
Fourth Official: Stefan Ebner (AUT)
Referee Observer: Clayton Pisani (MLT)
Zalgiris – Pyunik
Referee: Juxhin Xhaja (ALB)
Assistant Referee 1: Rejdi Avdo (ALB)
Assistant Referee 2: Nertil Bregasi (ALB)
Fourth Official: Cjapi Kreshnik (ALB)
Referee Observer: Stephane Lannoy (FRA)