| Argentina (6) |
|---|
| Bagnis, Facundo | | Delbonis, Federico | | Mayer, Leonardo | | Olivo, Renzo | | Schwartzman, Diego | | Zeballos, Horacio |
| | Belgium (1) |
|---|
| Greef, Arthur De |
| | Brazil (2) |
|---|
| Bellucci, Thomaz | | Monteiro, Thiago |
| | France (2) |
|---|
| Chardy, Jeremy | | Mathieu, Paul-Henri |
|
| Georgia (1) |
|---|
| Basilashvili, Nikoloz |
| | Germany (4) |
|---|
| Brown, Dustin | | Haas, Tommy | | Marterer, Maximilian | | Struff, Jan-Lennard |
| | Latvia (1) |
|---|
| Gulbis, Ernests |
| | Russia (2) |
|---|
| Khachanov, Karen | | Kuznetsov, Andrey |
|
| | Spain (4) |
|---|
| Carreno Busta, Pablo | | Ferrer, David | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
| | Sweden (2) |
|---|
| Ymer, Elias | | Ymer, Mikael |
| | Switzerland (1) |
|---|
| Laaksonen, Henri |
|
| Ukraine (1) |
|---|
| Dolgopolov, Alexandr |
| |