| Argentina (3) |
|---|
| Londero, Juan Ignacio | | Mayer, Leonardo | | Pella, Guido |
| | Australia (1) |
|---|
| Millman, John |
| | | France (3) |
|---|
| Chardy, Jeremy | | Herbert, Pierre-Hugues | | Simon, Gilles |
|
| Italy (2) |
|---|
| Cecchinato, Marco | | Fabbiano, Thomas |
| | Kazakhstan (1) |
|---|
| Kukushkin, Mikhail |
| | | Poland (1) |
|---|
| Hurkacz, Hubert |
|
| Serbia (2) |
|---|
| Djere, Laslo | | Lajovic, Dusan |
| | Spain (2) |
|---|
| Lopez, Feliciano | | Verdasco, Fernando |
| | United Kingdom (6) |
|---|
| Clarke, Jay | | Edmund, Kyle | | Evans, Daniel | | Jubb, Paul | | Norrie, Cameron | | Ward, James |
| | United States (6) |
|---|
| Fritz, Taylor | | Johnson, Steve | | Kudla, Denis | | Opelka, Reilly | | Querrey, Sam | | Sandgren, Tennys |
|