| Argentina (1) |
|---|
| Londero, Juan Ignacio |
| | Australia (2) |
|---|
| Popyrin, Alexei | | Thompson, Jordan |
| | Belarus (1) |
|---|
| Gerasimov, Egor |
| | Bulgaria (1) |
|---|
| Dimitrov, Grigor |
|
| Canada (3) |
|---|
| Auger-Aliassime, Felix | | Pospisil, Vasek | | Shapovalov, Denis |
| | Chile (1) |
|---|
| Garin, Christian |
| | |
| Hungary (1) |
|---|
| Fucsovics, Marton |
| | Kazakhstan (1) |
|---|
| Bublik, Alexander |
| | Lithuania (1) |
|---|
| Berankis, Ricardas |
| |
| Poland (1) |
|---|
| Majchrzak, Kamil |
| | | | South Africa (1) |
|---|
| Harris, Lloyd |
|
| South Korea (1) |
|---|
| Chung, Hyeon |
| | Spain (2) |
|---|
| Carreno Busta, Pablo | | Verdasco, Fernando |
| | | United Kingdom (2) |
|---|
| Edmund, Kyle | | Evans, Daniel |
|
| United States (3) |
|---|
| Fritz, Taylor | | Isner, John | | Klahn, Bradley |
|