| Austria (3) |
|---|
| Austria Wien, | | Rapid Wien, | | Red Bull Salzburg, |
| | Azerbaigian (2) |
|---|
| Qäbälä, | | Qarabağ, |
| | Belgio (4) |
|---|
| AA Gent, | | Anderlecht, | | Racing Genk, | | Standard Liège, |
| |
| | Repubblica Ceca (3) |
|---|
| Slovan Liberec, | | Sparta Praha, | | Viktoria Plzeň, |
| | Danimarca (1) |
|---|
| FC København, |
| | Inghilterra (3) |
|---|
| Manchester United, | | Southampton, | | Tottenham Hotspur, |
|
| Francia (3) |
|---|
| Olympique Lyon, | | Olympique Nice, | | Saint-Etienne, |
| | Germania (3) |
|---|
| Borussia M'gladbach, | | Mainz 05, | | Schalke 04, |
| | Grecia (3) |
|---|
| Olympiacos Piraeus, | | Panathinaikos, | | PAOK FC, |
| |
| Israele (2) |
|---|
| Hapoel Beer-Sheva, | | Maccabi Tel Aviv, |
| | Italia (4) |
|---|
| AS Roma, | | Fiorentina, | | Internazionale, | | Sassuolo, |
| | | Olanda (3) |
|---|
| Ajax, | | AZ, | | Feyenoord, |
|
| Polonia (1) |
|---|
| Legia Warszawa, |
| | Portogallo (1) |
|---|
| Sporting Braga, |
| | Romania (2) |
|---|
| FC Astra Giurgiu, | | Steaua Bucureşti, |
| | Russia (3) |
|---|
| FC Krasnodar, | | FC Rostov, | | FC Zenit, |
|
| Spagna (3) |
|---|
| Athletic Club, | | Celta de Vigo, | | Villarreal, |
| | Svizzera (2) |
|---|
| FC Zürich, | | Young Boys, |
| | Turchia (4) |
|---|
| Besiktas, | | Fenerbahçe, | | Konyaspor, | | Osmanlıspor, |
| | Ucraina (2) |
|---|
| Shakhtar Donetsk, | | Zorya Luhansk, |
|