Elfsborg – Sheriff
Referee: Luis Godinho POR (photo)
Assistant Referee 1: Rui Teixeira POR
Assistant Referee 2: Pedro Mota POR
Fourth Official: Helder Malheiro POR
VAR: Fabio Melo POR
AVAR: Catarina Campos POR
Referee Observer: Alexandru Deaconu ROU
Trabzonspor – Ruzomberok
Referee: Nenad Minaković SRB
Assistant Referee 1: Nikola Borović SRB
Assistant Referee 2: Boško Božović SRB
Fourth Official: Milan Mitić SRB
VAR: Novak Simović SRB
AVAR: Lazar Lukić SRB
Referee Observer: Stefano Podeschi SMR
Silkeborg – Molde
Referee: Luka Bilbija BIH
Assistant Referee 1: Damir Lazić BIH
Assistant Referee 2: Arnel Novalić BIH
Fourth Official: Dragan Petrović BIH
Referee Observer: Herbert Fandel GER
Maccabi Petah Tiqva – SC Braga
Referee: Evangelos Manouchos GRE
Assistant Referee 1: Konstantínos Nikolaidis GRE
Assistant Referee 2: Tryfon Petropoulos GRE
Fourth Official: Chrístos Vergetis GRE
Referee Observer: Frank De Bleeckere BEL
Vojvodina – Ajax
Referee: Arda Kardeşler TUR
Assistant Referee 1: Mehmet Tugral TUR
Assistant Referee 2: Süleyman Özay TUR
Fourth Official: Cihan Aydin TUR
Referee Observer: Darko Čeferin SVN
Cercle Bruges – Kilmarnock
Referee: Ante Čulina CRO
Assistant Referee 1: Luka Pušić CRO
Assistant Referee 2: Dario Kolarević CRO
Fourth Official: Mateo Erceg CRO
VAR: Fran Jović CRO
AVAR: Dario Bel CRO
Referee Observer: Stefan Messner AUT
Rijeka – Corvinul
Referee: Sivert Amland NOR
Assistant Referee 1: Alf Rossland NOR
Assistant Referee 2: Tom Gronevik NOR
Fourth Official: Marius Hansen NOR
VAR: Clay Ruperti NED
AVAR: Mohammad Aslam NOR
Referee Observer: Dejan Filipović SRB
Botev – Panathinaikos
Referee: Daniel Schlager GER
Assistant Referee 1: Robert Kempter GER
Assistant Referee 2: Sven Waschitzki GER
Fourth Official: Florian Badstübner GER
VAR: Benjamin Brand GER
AVAR: Robert Schröder GER
Referee Observer: Rune Pedersen NOR
Rapid Wien – Wisla Krakow
Referee: Michael Oliver ENG
Assistant Referee 1: James Mainwaring ENG
Assistant Referee 2: Daniel Robathan ENG
Fourth Official: Darren Bond ENG
VAR: Peter Bankes ENG
AVAR: Nick Hopton ENG
Referee Observer: Emil Božinovski MKD
Assistant Referee 1: James Mainwaring ENG
Assistant Referee 2: Daniel Robathan ENG
Fourth Official: Darren Bond ENG
VAR: Peter Bankes ENG
AVAR: Nick Hopton ENG
Referee Observer: Emil Božinovski MKD