| | | Belgium (2) |
|---|
| AA Gent, | | Anderlecht, |
| | Bulgaria (1) |
|---|
| Lokomotiv Plovdiv, |
|
| | Czech Republic (1) |
|---|
| Viktoria Plzeň, |
| | |
| | | Netherlands (2) |
|---|
| Feyenoord, | | Vitesse, |
| | Northern Ireland (1) |
|---|
| Larne FC, |
|
| Portugal (1) |
|---|
| Paços de Ferreira, |
| | | | Serbia (2) |
|---|
| FK Partizan, | | FK Vojvodina, |
|
| Switzerland (2) |
|---|
| FC Basel, | | FC Luzern, |
| |