| Argentina (1) |
|---|
| Tirante, Thiago Agustin |
| | Bulgaria (1) |
|---|
| Dimitrov, Grigor |
| | | France (3) |
|---|
| Halys, Quentin | | Moutet, Corentin | | Muller, Alexandre |
|
| | Italy (3) |
|---|
| Berrettini, Matteo | | Darderi, Luciano | | Sonego, Lorenzo |
| | Netherlands (1) |
|---|
| Griekspoor, Tallon |
| |
| Russia (2) |
|---|
| Kotov, Pavel | | Rublev, Andrey |
| | Serbia (2) |
|---|
| Djere, Laslo | | Kecmanovic, Miomir |
| | Spain (2) |
|---|
| Davidovich Fokina, Alejandro | | Martinez, Pedro |
| | Sweden (2) |
|---|
| Borg, Leo | | Ymer, Elias |
|
| Switzerland (3) |
|---|
| Huesler, Marc-Andrea | | Stricker, Dominic | | Wawrinka, Stan |
| | United Kingdom (2) |
|---|
| Fearnley, Jacob | | Norrie, Cameron |
| | United States (3) |
|---|
| Kovacevic, Aleksandar | | Nakashima, Brandon | | Paul, Tommy |
|