| Referee | Games |  |  | Cards per game |
|---|
| Karim Abed | 1 | 4 | 0 | 4.0 (4.0 / 0.0) | |
| Əliyar Ağayev | 1 | 7 | 0 | 7.0 (7.0 / 0.0) | |
| Mohammed Al-Hakim | 1 | 5 | 0 | 5.0 (5.0 / 0.0) | |
| Aleksandrs Anufrijevs | 1 | 3 | 0 | 3.0 (3.0 / 0.0) | |
| Petr Ardeleanu | 2 | 11 | 1 | 6.0 (5.5 / 0.5) | |
| Marius Avram | 1 | 7 | 0 | 7.0 (7.0 / 0.0) | |
| Benoît Bastien | 2 | 7 | 0 | 3.5 (3.5 / 0.0) | |
| John Beaton | 1 | 3 | 0 | 3.0 (3.0 / 0.0) | |
| Ivan Bebek | 1 | 6 | 0 | 6.0 (6.0 / 0.0) | |
| Serhiy Boiko | 1 | 6 | 1 | 7.0 (6.0 / 1.0) | |
| Jérôme Brisard | 1 | 5 | 0 | 5.0 (5.0 / 0.0) | |
| Felix Brych | 1 | 6 | 0 | 6.0 (6.0 / 0.0) | |
| Ruddy Buquet | 1 | 7 | 1 | 8.0 (7.0 / 1.0) | |
| Cüneyt Çakır | 2 | 4 | 0 | 2.0 (2.0 / 0.0) | |
| Trustin Cann | 1 | 5 | 0 | 5.0 (5.0 / 0.0) | |
| Timotheos Christofi | 1 | 5 | 1 | 6.0 (5.0 / 1.0) | |
| Willie Collum | 2 | 6 | 1 | 3.5 (3.0 / 0.5) | |
| David Coote | 1 | 3 | 0 | 3.0 (3.0 / 0.0) | |
| Nikola Dabanović | 2 | 6 | 0 | 3.0 (3.0 / 0.0) | |
| Jørgen Daugbjerg Burchardt | 1 | 10 | 0 | 10.0 (10.0 / 0.0) | |
| Ricardo De Burgos Bengoetxea | 1 | 5 | 0 | 5.0 (5.0 / 0.0) | |
| Carlos Del Cerro Grande | 2 | 10 | 1 | 5.5 (5.0 / 0.5) | |
| Alain Durieux | 1 | 4 | 0 | 4.0 (4.0 / 0.0) | |
| Andreas Ekberg | 2 | 5 | 0 | 2.5 (2.5 / 0.0) | |
| Javier Estrada Fernández | 1 | 5 | 0 | 5.0 (5.0 / 0.0) | |
| Ádám Farkas | 1 | 5 | 0 | 5.0 (5.0 / 0.0) | |
| Bartosz Frankowski | 3 | 12 | 1 | 4.3 (4.0 / 0.3) | |
| Stephanie Frappart | 1 | 5 | 0 | 5.0 (5.0 / 0.0) | |
| Mattias Gestranius | 2 | 12 | 1 | 6.5 (6.0 / 0.5) | |
| Paweł Gil | 1 | 0 | 0 | 0.0 (0.0 / 0.0) | |
| Jesús Gil Manzano | 2 | 7 | 3 | 5.0 (3.5 / 1.5) | |
| Filip Glova | 1 | 4 | 0 | 4.0 (4.0 / 0.0) | |
| Hüseyin Göçek | 1 | 7 | 1 | 8.0 (7.0 / 1.0) | |
| Luis Godinho | 1 | 4 | 0 | 4.0 (4.0 / 0.0) | |
| Serdar Gözübüyük | 1 | 6 | 0 | 6.0 (6.0 / 0.0) | |
| Iwan Griffith | 1 | 6 | 0 | 6.0 (6.0 / 0.0) | |
| Orel Grinfeeld | 2 | 6 | 0 | 3.0 (3.0 / 0.0) | |
| Marco Guida | 1 | 2 | 0 | 2.0 (2.0 / 0.0) | |
| Ovidiu Hategan | 2 | 8 | 0 | 4.0 (4.0 / 0.0) | |
| Alejandro Hernández Hernández | 1 | 2 | 0 | 2.0 (2.0 / 0.0) | |
| Dennis Higler | 1 | 6 | 1 | 7.0 (6.0 / 1.0) | |
| Sergey Ivanov | 1 | 7 | 1 | 8.0 (7.0 / 1.0) | |
| Enea Jorgji | 1 | 8 | 0 | 8.0 (8.0 / 0.0) | |
| Srđan Jovanović | 3 | 12 | 3 | 5.0 (4.0 / 1.0) | |
| Fran Jović | 2 | 9 | 0 | 4.5 (4.5 / 0.0) | |
| Matej Jug | 1 | 5 | 0 | 5.0 (5.0 / 0.0) | |
| Georgi Kabakov | 2 | 14 | 1 | 7.5 (7.0 / 0.5) | |
| Kristoffer Karlsson | 1 | 2 | 0 | 2.0 (2.0 / 0.0) | |
| Chris Kavanagh | 2 | 6 | 1 | 3.5 (3.0 / 0.5) | |
| Peter Kjærsgaard | 1 | 6 | 1 | 7.0 (6.0 / 1.0) | |
| István Kovács | 3 | 13 | 0 | 4.3 (4.3 / 0.0) | |
| Pavel Královec | 2 | 8 | 0 | 4.0 (4.0 / 0.0) | |
| Giorgi Kruashvili | 1 | 4 | 0 | 4.0 (4.0 / 0.0) | |
| Ivan Kružliak | 2 | 7 | 0 | 3.5 (3.5 / 0.0) | |
| Bjorn Kuipers | 1 | 5 | 0 | 5.0 (5.0 / 0.0) | |
| Alexey Kulbakov | 2 | 8 | 1 | 4.5 (4.0 / 0.5) | |
| Erik Lambrechts | 1 | 0 | 0 | 0.0 (0.0 / 0.0) | |
| Harald Lechner | 1 | 5 | 0 | 5.0 (5.0 / 0.0) | |
| François Letexier | 2 | 8 | 1 | 4.5 (4.0 / 0.5) | |
| Kirill Levnikov | 1 | 11 | 0 | 11.0 (11.0 / 0.0) | |
| Bobby Madden | 2 | 9 | 0 | 4.5 (4.5 / 0.0) | |
| Andrew Madley | 1 | 3 | 0 | 3.0 (3.0 / 0.0) | |
| Danny Makkelie | 2 | 7 | 1 | 4.0 (3.5 / 0.5) | |
| Szymon Marciniak | 2 | 9 | 1 | 5.0 (4.5 / 0.5) | |
| Fabio Maresca | 1 | 3 | 0 | 3.0 (3.0 / 0.0) | |
| Maurizio Mariani | 2 | 6 | 0 | 3.0 (3.0 / 0.0) | |
| Tiago Martins | 1 | 6 | 0 | 6.0 (6.0 / 0.0) | |
| Davide Massa | 2 | 9 | 0 | 4.5 (4.5 / 0.0) | |
| Dimitar Meckarovski | 1 | 10 | 1 | 11.0 (10.0 / 1.0) | |
| Halil Meler | 1 | 4 | 0 | 4.0 (4.0 / 0.0) | |
| Kateryna Monzul | 1 | 4 | 1 | 5.0 (4.0 / 1.0) | |
| Dumitru Muntean | 1 | 4 | 0 | 4.0 (4.0 / 0.0) | |
| Antti Munukka | 1 | 8 | 0 | 8.0 (8.0 / 0.0) | |
| Glenn Nyberg | 2 | 7 | 0 | 3.5 (3.5 / 0.0) | |
| Rade Obrenović | 1 | 6 | 0 | 6.0 (6.0 / 0.0) | |
| Michael Oliver | 3 | 12 | 1 | 4.3 (4.0 / 0.3) | |
| Daniele Orsato | 1 | 0 | 0 | 0.0 (0.0 / 0.0) | |
| Harm Osmers | 1 | 7 | 0 | 7.0 (7.0 / 0.0) | |
| Alì Palabiyik | 1 | 3 | 0 | 3.0 (3.0 / 0.0) | |
| Bojan Pandžić | 1 | 2 | 0 | 2.0 (2.0 / 0.0) | |
| Craig Pawson | 1 | 5 | 1 | 6.0 (5.0 / 1.0) | |
| Irfan Peljto | 2 | 9 | 0 | 4.5 (4.5 / 0.0) | |
| Radu Petrescu | 1 | 9 | 0 | 9.0 (9.0 / 0.0) | |
| João Pinheiro | 1 | 3 | 0 | 3.0 (3.0 / 0.0) | |
| Paweł Raczkowski | 2 | 6 | 0 | 3.0 (3.0 / 0.0) | |
| Roi Reinshreiber | 1 | 5 | 1 | 6.0 (5.0 / 1.0) | |
| Don Robertson | 1 | 4 | 0 | 4.0 (4.0 / 0.0) | |
| Donatas Rumšas | 2 | 13 | 0 | 6.5 (6.5 / 0.0) | |
| José Sánchez Martínez | 1 | 4 | 0 | 4.0 (4.0 / 0.0) | |
| Sandro Schärer | 3 | 10 | 0 | 3.3 (3.3 / 0.0) | |
| Manuel Schüttengruber | 1 | 1 | 0 | 1.0 (1.0 / 0.0) | |
| Eitan Shemeulevitch | 1 | 5 | 0 | 5.0 (5.0 / 0.0) | |
| Anastasios Sidiropoulos | 2 | 10 | 1 | 5.5 (5.0 / 0.5) | |
| Daniel Siebert | 2 | 10 | 0 | 5.0 (5.0 / 0.0) | |
| Artur Soares Dias | 2 | 8 | 0 | 4.0 (4.0 / 0.0) | |
| Aleksandar Stavrev | 1 | 1 | 0 | 1.0 (1.0 / 0.0) | |
| Kai Steen | 1 | 2 | 0 | 2.0 (2.0 / 0.0) | |
| Daniel Stefanski | 1 | 6 | 0 | 6.0 (6.0 / 0.0) | |
| Sascha Stegemann | 1 | 6 | 3 | 9.0 (6.0 / 3.0) | |
| Tobias Stieler | 2 | 6 | 0 | 3.0 (3.0 / 0.0) | |
| Ivajilo Stoyanov | 1 | 4 | 0 | 4.0 (4.0 / 0.0) | |
| Roomer Tarajev | 1 | 4 | 1 | 5.0 (4.0 / 1.0) | |
| Anthony Taylor | 2 | 8 | 0 | 4.0 (4.0 / 0.0) | |
| Kristo Tohver | 2 | 5 | 0 | 2.5 (2.5 / 0.0) | |
| Andris Treimanis | 2 | 5 | 0 | 2.5 (2.5 / 0.0) | |
| Léonce Tschudi | 1 | 2 | 0 | 2.0 (2.0 / 0.0) | |
| Clément Turpin | 1 | 4 | 1 | 5.0 (4.0 / 1.0) | |
| Fábio Veríssimo | 2 | 8 | 1 | 4.5 (4.0 / 0.5) | |
| Slavko Vincic | 2 | 3 | 0 | 1.5 (1.5 / 0.0) | |
| Lawrence Visser | 2 | 12 | 1 | 6.5 (6.0 / 0.5) | |
| Julian Weinberger | 1 | 6 | 0 | 6.0 (6.0 / 0.0) | |
| Felix Zwayer | 2 | 10 | 0 | 5.0 (5.0 / 0.0) | |
England