Samsunspor – Rayo Vallecano
Referee: Marian Barbu ROU (photo)
Assistant Referee 1: Mircea Grigoriu ROU
Assistant Referee 2: Adrian Vornicu ROU
Fourth Official: Sebastian Colţescu ROU
VAR: Cătălin Popa ROU
AVAR: Marcel Birsan ROU
Referee Observer: Cyril Zimmermann SUI
Lech Poznan – Shakhtar Donetsk
Referee: Rohit Saggi NOR
Assistant Referee 1: Anders Dale NOR
Assistant Referee 2: Jorgen Valstadsve NOR
Fourth Official: Daniel Higraff NOR
VAR: Kristoffer Hagenes NOR
AVAR: Marius Lien NOR
Referee Observer: Costas Kapitanis CYP
AZ Alkmaar – Sparta Praha
Referee: Sebastian Gishamer AUT
Assistant Referee 1: Santino Schreiner AUT
Assistant Referee 2: Roland Brandner AUT
Fourth Official: Walter Altmann AUT
VAR: Manuel Schuettengruber AUT
AVAR: Alan Kijas AUT
Referee Observer: Paolo Valeri ITA
HNK Rijeka – RC Strasbourg
Referee: Vassilis Fotias GRE
Assistant Referee 1: Andreas Meintanas GRE
Assistant Referee 2: Michail Papadakis GRE
Fourth Official: Alexandros Tsakalidis GRE
VAR: Angelos Evangelou GRE
AVAR: Athanasios Tzilos GRE
Referee Observer: Stefan Johannesson SWE
Crystal Palace – AEK Larnaka
Referee: Igor Pajač CRO
Assistant Referee 1: Bojan Zobenica CRO
Assistant Referee 2: Ivan Mihalj CRO
Fourth Official: Dario Bel CRO
VAR: Ivan Bebek CRO
AVAR: Fran Jović CRO
Referee Observer: Leslie Irvine NIR
AC Fiorentina – Rakow Czestochowa
Referee: Georgi Kabakov BUL
Assistant Referee 1: Martin Margaritov BUL
Assistant Referee 2: Martin Venev BUL
Fourth Official: Radoslav Gidzhenov BUL
VAR: Dragomir Draganov BUL
AVAR: Nikola Popov BUL
Referee Observer: Carlos Clos Gómez ESP
NK Celje – AEK Athens
Referee: Luis Godinho POR
Assistant Referee 1: Rui Teixeira POR
Assistant Referee 2: Pedro Martins POR
Fourth Official: Fabio Verissimo POR
VAR: André Narciso POR
AVAR: Bruno Esteves POR
Referee Observer: Alain Hamer LUX
Sigma Olomouc – FSV Mainz
Referee: Mohammad Al-Emara FIN
Assistant Referee 1: Turkka Valjakka FIN
Assistant Referee 2: Mika Lamppu FIN
Fourth Official: Peiman Simani FIN
VAR: Pawel Malec POL
AVAR: Kornel Paszkiewicz POL
Referee Observer: Kyros Vassaras GRE
