These are the referee appointments for the second leg ties of UEFA Europa League's Round of 32. Among others, top-class referee Björn Kuipers will take charge of Eintracht Frankfurt - FC Porto and Poland's Szymon Marciniak (photo) will be observed by Marc Batta, vice Chief Officer in UEFA's referee committee.
18:00 CET, Rubin, Kazan (RUS)
Rubin Kazan - Real Betis
Referee: Michael Oliver (ENG)
Assistant Referee 1: Stuart Burt (ENG)
Assistant Referee 2: Darren England (ENG)
Additional Assistant Referee 1: Anthony Taylor (ENG)
Additional Assistant Referee 2: Jonathan Moss (ENG)
Fourth Official: Simon Beck (ENG)
Referee Observer: Georgios Bikas (GRE)
UEFA Delegate: Stanislaw Speczik (POL)
Blog Referee Observer: Edward (GRE)
19:00 CET, Stadio San Paolo, Napoli (ITA)
SSC Napoli - Swansea City
Referee: Ovidiu Alin Hategan (ROU)
Assistant Referee 1: Octavian Sovre (ROU)
Assistant Referee 2: Sebastian Eugen Gheorghe (ROU)
Additional Assistant Referee 1: Sebastian Coltescu (ROU)
Additional Assistant Referee 2: István Kovács (ROU)
Fourth Official: Radu Adrian Ghinguleac (ROU)
Referee Observer: Alain Hamer (LUX)
UEFA Delegate: George Koumas (CYP)
Blog Referee Observer: Philipp S. (GER)
19:00 CET, Donbass Arena, Donetsk (UKR)
Shakhtar Donetsk - Viktoria Plzen
Referee: Pol van Boekel (NED)
Assistant Referee 1: Davie Goossens (NED)
Assistant Referee 2: Bas van Dongen (NED)
Additional Assistant Referee 1: Serdar Gözübüyük (NED)
Additional Assistant Referee 2: Dennis Higler (NED)
Fourth Official: Rob van de Ven (NED)
Referee Observer: Miroslav Radoman (SRB)
UEFA Delegate: Michel Pralong (SUI)
19:00 CET, Commerzbank Arena, Frankfurt (GER)
Eintracht Frankfurt - FC Porto
Referee: Björn Kuipers (NED)
Assistant Referee 1: Angelo Boonman (NED)
Assistant Referee 2: Erwin E.J. Zeinstra (NED)
Additional Assistant Referee 1: Richard Liesveld (NED)
Additional Assistant Referee 2: Ed Janssen (NED)
Fourth Official: Charles Schaap (NED)
Referee Observer: Levan Paniashvili (GEO)
UEFA Delegate: Michael Appleby (ENG)
19:00 CET, Estadio Ramón Sánchez Pizjuán, Sevilla (ESP)
Sevilla CF - NK Maribor
Referee: Luca Banti (ITA)
Assistant Referee 1: Sandro Pozzi (SUI)
Assistant Referee 2: Riccardo Di Fiore (ITA)
Additional Assistant Referee 1: Andrea Gervasoni (ITA)
Additional Assistant Referee 2: Domenico Celi (ITA)
Fourth Official: Matteo Passeri (ITA)
Referee Observer: László Vagner (HUN)
UEFA Delegate: Joël Wolff (LUX)
19:00 CET, Stadion Salzburg, Salzburg (AUT)
RB Salzburg - Ajax Amsterdam
Referee: Paolo Tagliavento (ITA)
Assistant Referee 1: Mauro Tonolini (ITA)
Assistant Referee 2: Lorenzo Manganelli (ITA)
Additional Assistant Referee 1: Antonio Damato (ITA)
Additional Assistant Referee 2: Carmine Russo (ITA)
Fourth Official: Alessandro Constanzo (ITA)
Referee Observer: Patrick Kelly (IRL)
UEFA Delegate: Andrei Medintsev (BUL)
19:00 CET, Natsionalen Stadion Vasil Levski, Sofia (BUL)
Ludogorets - Lazio Roma
Referee: Olegário Benquerença (POR)
Assistant Referee 1: Ricardo Santos (POR)
Assistant Referee 2: Rui Tavares (POR)
Additional Assistant Referee 1: Manuel De Sousa (POR)
Additional Assistant Referee 2: Artur Soares Dias (POR)
Fourth Official: Nuno Tomás Pereira (POR)
Referee Observer: Rodger Gifford (WAL)
UEFA Delegate: Claude Runavot (FRA)
19:00 CET, St. Jakob-Park, Basel (SUI)
FC Basel - Maccabi Tel-Aviv
Referee: Ivan Bebek (CRO)
Assistant Referee 1: Tomislav Petrović (CRO)
Assistant Referee 2: Miro Grgić (CRO)
Additional Assistant Referee 1: Tihomir Pejin (CRO)
Additional Assistant Referee 2: Goran Gabrilo (CRO)
Fourth Official: Dalibor Conjar (CRO)
Referee Observer: Ilkka Koho (FIN)
UEFA Delegate: Pat Quigley (IRL)
Blog Referee Observer: Chefren (ITA)
21:05 CET, Estadi de Mestalla, Valencia (ESP)
Valencia CF - Dynamo Kyiv
Referee: Deniz Aytekin (GER)
Assistant Referee 1: Guido Kleve (GER)
Assistant Referee 2: Markus Häcker (GER)
Additional Assistant Referee 1: Bastian Dankert (GER)
Additional Assistant Referee 2: Daniel Siebert (GER)
Fourth Official: Mark Borsch (GER)
Referee Observer: Konrad Plautz (AUT)
UEFA Delegate: Gerhard Sager (SWE)
Blog Referee Observer: Thomas H. (NED)
21:05 CET, White Hart Lane, London (ENG)
Tottenham - Dnipro
Referee: Antony Gautier (FRA)
Assistant Referee 1: Michaël Annonier (FRA)
Assistant Referee 2: Philippe Jeanne (FRA)
Additional Assistant Referee 1: Benoît Bastien (FRA)
Additional Assistant Referee 2: Benoît Millot (FRA)
Fourth Official: Guillaume Débart (FRA)
Referee Observer: Rune Pedersen (NOR)
UEFA Delegate: José Aguilar (POR)
Blog Referee Observer: Niclas (GER)
21:05 CET, KRC Genk Arena, Genk (BEL)
KRC Genk - Anji
Referee: Manuel Gräfe (GER)
Assistant Referee 1: Thorsten Schiffner (GER)
Assistant Referee 2: Mike Pickel (GER)
Additional Assistant Referee 1: Marco Fritz (GER)
Additional Assistant Referee 2: Robert Hartmann (GER)
Fourth Official: Holger Henschel (GER)
Referee Observer: Miroslav Vitković (CRO)
UEFA Delegate: Teuvo Holopainen (FIN)
21:05 CET, Hüseyin Avni Aker Stadyumu, Trabzon (TUR)
Trabzonspor - Juventus Turin
Referee: Pavel Královec (CZE)
Assistant Referee 1: Roman Slyško (SVK)
Assistant Referee 2: Martin Wilczek (CZE)
Additional Assistant Referee 1: Radek Příhoda (CZE)
Additional Assistant Referee 2: Michal Patak (CZE)
Fourth Official: Ondrej Pelikan (CZE)
Referee Observer: Markus Nobs (SUI)
UEFA Delegate: Ronny Zimmermann (GER)
21:05 CET, Stade de Gerland, Lyon (FRA)
Olympique Lyon - Chornomorets Odessa
Referee: Aleksandar Stavrev (MKD)
Assistant Referee 1: Marjan Kirovski (MKD)
Assistant Referee 2: Dejan Kostadinov (MKD)
Additional Assistant Referee 1: Dimitar Meckarvoski (MKD)
Additional Assistant Referee 2: Dejan Jakimovski (MKD)
Fourth Official: Nikola Karakolev (MKD)
Referee Observer: Costas Kapitanis (CYP)
UEFA Delegate: Milovan Djukanovic (MNE)
Blog Referee Observer: Nur H. (ENG)
21:05 CET, Estádio da Luz, Lisbon (POR)
SL Benfica - PAOK
Referee: Szymon Marciniak (POL)
Assistant Referee 1: Pawel Sokolnicki (POL)
Assistant Referee 2: Tomasz Listkiewicz (POL)
Additional Assistant Referee 1: Pawel Raczkowski (POL)
Additional Assistant Referee 2: Tomasz Musial (POL)
Fourth Official: Radoslaw Siejka (POL)
Referee Observer: Marc Batta (FRA)
UEFA Delegate: Danilo Filacchione (ITA)
Blog Referee Observer: Chefren (ITA)
21:05 CET, AZ Stadion, Alkmaar (NED)
AZ Alkmaar - Slovan Liberec
Referee: Serhiy Boiko (UKR)
Assistant Referee 1: Oleksandr Korniyko (UKR)
Assistant Referee 2: Volodymyr Volodin (UKR)
Additional Assistant Referee 1: Ievgenii Aranovskyi (UKR)
Additional Assistant Referee 2: Anatoliy Abdula (UKR)
Fourth Official: Oleksandr Voytyuk (UKR)
Referee Observer: Edgar Steinborn (GER)
UEFA Delegate: Ghenadie Scurtul (MDA)
Blog Referee Observer: Edward (GRE)
21:05 CET, Stadio Artemio Franchi, Florence (ITA)
ACF Fiorentina - Esbjerg fB
Referee: Marijo Strahonja (CRO)
Assistant Referee 1: Sinisa Premuzaj (CRO)
Assistant Referee 2: Goran Pataki (CRO)
Additional Assistant Referee 1: Ante Vučemilović-Šimunović jr (CRO)
Additional Assistant Referee 2: Fran Jović (CRO)
Fourth Official: Ivica Modrić (CRO)
Referee Observer: Raymond Ellingham (WAL)
UEFA Delegate: Graham Hover (ENG)