| Australien (6) |
|---|
| De Minaur, Alex | | Ebden, Matthew | | Millman, John | | O'Connell, Christopher | | Popyrin, Alexei | | Thompson, Jordan |
| | Østrig (2) |
|---|
| Novak, Dennis | | Thiem, Dominic |
| | Hviderusland (1) |
|---|
| Gerasimov, Egor |
| |
| Canada (2) |
|---|
| Pospisil, Vasek | | Shapovalov, Denis |
| | | Finland (1) |
|---|
| Ruusuvuori, Emil |
| | Frankrig (3) |
|---|
| Chardy, Jeremy | | Gasquet, Richard | | Tsonga, Jo-Wilfried |
|
| Georgien (1) |
|---|
| Basilashvili, Nikoloz |
| | Tyskland (1) |
|---|
| Struff, Jan-Lennard |
| | Ungarn (1) |
|---|
| Fucsovics, Marton |
| |
| Italien (4) |
|---|
| Cecchinato, Marco | | Giustino, Lorenzo | | Sinner, Jannik | | Sonego, Lorenzo |
| | Japan (2) |
|---|
| Nishikori, Kei | | Nishioka, Yoshihito |
| | Kasakhstan (2) |
|---|
| Bublik, Alexander | | Kukushkin, Mikhail |
| |
| | Rusland (3) |
|---|
| Karatsev, Aslan | | Khachanov, Karen | | Rublev, Andrey |
| | Serbien (2) |
|---|
| Krajinovic, Filip | | Lajovic, Dusan |
| | Slovenien (1) |
|---|
| Bedene, Aljaz |
|
| Sydafrika (1) |
|---|
| Harris, Lloyd |
| | Spanien (5) |
|---|
| Bautista Agut, Roberto | | Carreno Busta, Pablo | | Davidovich Fokina, Alejandro | | Ramos-Vinolas, Albert | | Zapata Miralles, Bernabe |
| | Tunesien (1) |
|---|
| Jaziri, Malek |
| | Storbritannien (1) |
|---|
| Evans, Daniel |
|
| USA (2) |
|---|
| Fritz, Taylor | | Opelka, Reilly |
|