| Austria (3) |
|---|
| Austria Wien, | | Rapid Wien, | | Red Bull Salzburg, |
| | Azerbaijan (2) |
|---|
| Qäbälä, | | Qarabağ, |
| | Belgium (4) |
|---|
| AA Gent, | | Anderlecht, | | Racing Genk, | | Standard Liège, |
| |
| | Czech Republic (3) |
|---|
| Slovan Liberec, | | Sparta Praha, | | Viktoria Plzeň, |
| | | England (3) |
|---|
| Manchester United, | | Southampton, | | Tottenham Hotspur, |
|
| France (3) |
|---|
| Olympique Lyon, | | Olympique Nice, | | Saint-Etienne, |
| | Germany (3) |
|---|
| Borussia M'gladbach, | | Mainz 05, | | Schalke 04, |
| | Greece (3) |
|---|
| Olympiacos Piraeus, | | Panathinaikos, | | PAOK FC, |
| |
| Israel (2) |
|---|
| Hapoel Beer-Sheva, | | Maccabi Tel Aviv, |
| | Italy (4) |
|---|
| AS Roma, | | Fiorentina, | | Internazionale, | | Sassuolo, |
| | | Netherlands (3) |
|---|
| Ajax, | | AZ, | | Feyenoord, |
|
| Poland (1) |
|---|
| Legia Warszawa, |
| | Portugal (1) |
|---|
| Sporting Braga, |
| | Romania (2) |
|---|
| FC Astra Giurgiu, | | Steaua Bucureşti, |
| | Russia (3) |
|---|
| FC Krasnodar, | | FC Rostov, | | FC Zenit, |
|
| Spain (3) |
|---|
| Athletic Club, | | Celta de Vigo, | | Villarreal, |
| | Swiss (2) |
|---|
| FC Zürich, | | Young Boys, |
| | Turkey (4) |
|---|
| Besiktas, | | Fenerbahçe, | | Konyaspor, | | Osmanlıspor, |
| | Ukraine (2) |
|---|
| Shakhtar Donetsk, | | Zorya Luhansk, |
|