| Referee | Games |  |  | Cards per game | |
|---|---|---|---|---|---|
| Javier Alberola Rojas | 1 | 4 | 0 | 4.0 (4.0 / 0.0) | |
| Mykola Balakin | 1 | 1 | 0 | 1.0 (1.0 / 0.0) | |
| Ricardo De Burgos Bengoetxea | 1 | 4 | 0 | 4.0 (4.0 / 0.0) | |
| Willy Delajod | 2 | 3 | 0 | 1.5 (1.5 / 0.0) | |
| Espen Eskås | 1 | 5 | 0 | 5.0 (5.0 / 0.0) | |
| Vasilis Fotias | 1 | 1 | 1 | 2.0 (1.0 / 1.0) | |
| Jesús Gil Manzano | 2 | 14 | 1 | 7.5 (7.0 / 0.5) | |
| Sebastian Gishamer | 2 | 5 | 0 | 2.5 (2.5 / 0.0) | |
| Luis Godinho | 2 | 7 | 0 | 3.5 (3.5 / 0.0) | |
| Serdar Gözübüyük | 3 | 14 | 1 | 5.0 (4.7 / 0.3) | |
| Marco Guida | 2 | 8 | 0 | 4.0 (4.0 / 0.0) | |
| Sven Jablonski | 3 | 8 | 0 | 2.7 (2.7 / 0.0) | |
| Georgi Kabakov | 2 | 10 | 2 | 6.0 (5.0 / 1.0) | |
| Chris Kavanagh | 2 | 13 | 0 | 6.5 (6.5 / 0.0) | |
| István Kovács | 1 | 2 | 0 | 2.0 (2.0 / 0.0) | |
| Ivan Kružliak | 2 | 4 | 0 | 2.0 (2.0 / 0.0) | |
| François Letexier | 2 | 7 | 0 | 3.5 (3.5 / 0.0) | |
| Szymon Marciniak | 2 | 6 | 0 | 3.0 (3.0 / 0.0) | |
| Maurizio Mariani | 1 | 2 | 1 | 3.0 (2.0 / 1.0) | |
| Davide Massa | 3 | 8 | 0 | 2.7 (2.7 / 0.0) | |
| Halil Meler | 1 | 9 | 0 | 9.0 (9.0 / 0.0) | |
| Nenad Minaković | 1 | 3 | 0 | 3.0 (3.0 / 0.0) | |
| Glenn Nyberg | 3 | 8 | 1 | 3.0 (2.7 / 0.3) | |
| Rade Obrenović | 2 | 5 | 1 | 3.0 (2.5 / 0.5) | |
| Michael Oliver | 3 | 10 | 1 | 3.6 (3.3 / 0.3) | |
| Harm Osmers | 1 | 6 | 1 | 7.0 (6.0 / 1.0) | |
| Igor Pajač | 1 | 2 | 0 | 2.0 (2.0 / 0.0) | |
| Irfan Peljto | 2 | 7 | 0 | 3.5 (3.5 / 0.0) | |
| João Pinheiro | 1 | 1 | 0 | 1.0 (1.0 / 0.0) | |
| Donatas Rumšas | 2 | 7 | 0 | 3.5 (3.5 / 0.0) | |
| Rohit Saggi | 2 | 8 | 0 | 4.0 (4.0 / 0.0) | |
| José Sánchez Martínez | 1 | 3 | 0 | 3.0 (3.0 / 0.0) | |
| Sandro Schärer | 2 | 9 | 0 | 4.5 (4.5 / 0.0) | |
| Urs Schnyder | 1 | 2 | 0 | 2.0 (2.0 / 0.0) | |
| Daniel Siebert | 2 | 7 | 0 | 3.5 (3.5 / 0.0) | |
| Simone Sozza | 2 | 7 | 0 | 3.5 (3.5 / 0.0) | |
| Tobias Stieler | 2 | 4 | 0 | 2.0 (2.0 / 0.0) | |
| Clément Turpin | 2 | 9 | 0 | 4.5 (4.5 / 0.0) | |
| Sander van der Eijk | 1 | 4 | 1 | 5.0 (4.0 / 1.0) | |
| Nick Walsh | 2 | 10 | 0 | 5.0 (5.0 / 0.0) | |
| Felix Zwayer | 2 | 8 | 0 | 4.0 (4.0 / 0.0) | |