| Argentina (3) |
|---|
| Berlocq, Carlos | | Olivo, Renzo | | Zeballos, Horacio |
| | Australia (1) |
|---|
| Tomic, Bernard |
| | Austria (1) |
|---|
| Thiem, Dominic |
| |
| Brazil (3) |
|---|
| Bellucci, Thomaz | | Dutra Silva, Rogerio | | Monteiro, Thiago |
| | | Colombia (1) |
|---|
| Giraldo, Santiago |
| | France (4) |
|---|
| Chardy, Jeremy | | Gasquet, Richard | | Herbert, Pierre-Hugues | | Paire, Benoit |
|
| Georgia (1) |
|---|
| Basilashvili, Nikoloz |
| | Germany (5) |
|---|
| Brown, Dustin | | Kohlschreiber, Philipp | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
| | | Japan (2) |
|---|
| Daniel, Taro | | Sugita, Yuichi |
|
| | | | Russia (1) |
|---|
| Khachanov, Karen |
|
| South Africa (1) |
|---|
| Anderson, Kevin |
| | South Korea (1) |
|---|
| Chung, Hyeon |
| | Spain (11) |
|---|
| Almagro, Nicolas | | Bautista Agut, Roberto | | Carreno Busta, Pablo | | Ferrer, David | | Garcia-Lopez, Guillermo | | Granollers, Marcel | | Lopez, Feliciano | | Montanes, Albert | | Nadal, Rafael | | Ramos-Vinolas, Albert | | Robredo, Tommy |
| |
| | United Kingdom (3) |
|---|
| Edmund, Kyle | | Evans, Daniel | | Murray, Andy |
| | | Uzbekistan (1) |
|---|
| Istomin, Denis |
|