| | | Belgium (1) |
|---|
| Royal Antwerp FC, |
| |
| Czech Republic (2) |
|---|
| FC Slovácko, | | Slavia Praha, |
| | | Greece (2) |
|---|
| Olympiacos Piraeus, | | Panathinaikos, |
| | Luxembourg (1) |
|---|
| F91 Dudelange, |
|
| Netherlands (2) |
|---|
| AZ, | | FC Twente, |
| | Northern Ireland (1) |
|---|
| Linfield FC, |
| | | Scotland (1) |
|---|
| Dundee United, |
|
| Serbia (2) |
|---|
| FK Cukarički, | | FK Partizan, |
| | Slovakia (1) |
|---|
| Slovan Bratislava, |
| | | Swiss (2) |
|---|
| FC Basel, | | FC Zürich, |
|
|