| Australia (6) |
|---|
| De Minaur, Alex | | Ebden, Matthew | | Millman, John | | O'Connell, Christopher | | Popyrin, Alexei | | Thompson, Jordan |
| | Austria (2) |
|---|
| Novak, Dennis | | Thiem, Dominic |
| | Bielorussia (1) |
|---|
| Gerasimov, Egor |
| |
| Canada (2) |
|---|
| Pospisil, Vasek | | Shapovalov, Denis |
| | | Finlandia (1) |
|---|
| Ruusuvuori, Emil |
| | Francia (3) |
|---|
| Chardy, Jeremy | | Gasquet, Richard | | Tsonga, Jo-Wilfried |
|
| Georgia (1) |
|---|
| Basilashvili, Nikoloz |
| | Germania (1) |
|---|
| Struff, Jan-Lennard |
| | Ungheria (1) |
|---|
| Fucsovics, Marton |
| |
| Italia (4) |
|---|
| Cecchinato, Marco | | Giustino, Lorenzo | | Sinner, Jannik | | Sonego, Lorenzo |
| | Giappone (2) |
|---|
| Nishikori, Kei | | Nishioka, Yoshihito |
| | Kazakistan (2) |
|---|
| Bublik, Alexander | | Kukushkin, Mikhail |
| |
| Polonia (1) |
|---|
| Hurkacz, Hubert |
| | Russia (3) |
|---|
| Karatsev, Aslan | | Khachanov, Karen | | Rublev, Andrey |
| | Serbia (2) |
|---|
| Krajinovic, Filip | | Lajovic, Dusan |
| | Slovenia (1) |
|---|
| Bedene, Aljaz |
|
| Sud Africa (1) |
|---|
| Harris, Lloyd |
| | Spagna (5) |
|---|
| Bautista Agut, Roberto | | Carreno Busta, Pablo | | Davidovich Fokina, Alejandro | | Ramos-Vinolas, Albert | | Zapata Miralles, Bernabe |
| | | Regno Unito (1) |
|---|
| Evans, Daniel |
|
| Stati Uniti (2) |
|---|
| Fritz, Taylor | | Opelka, Reilly |
|