| Argentina (3) |
|---|
| Delbonis, Federico | | Monaco, Juan | | Schwartzman, Diego |
| | Austria (1) |
|---|
| Thiem, Dominic |
| | Brazil (1) |
|---|
| Bellucci, Thomaz |
| | Colombia (3) |
|---|
| Falla, Alejandro | | Giraldo, Santiago | | Gonzalez, Alejandro |
|
| | Czech Republic (1) |
|---|
| Vesely, Jiri |
| | France (3) |
|---|
| De Schepper, Kenny | | Mannarino, Adrian | | Pouille, Lucas |
| | Germany (1) |
|---|
| Struff, Jan-Lennard |
|
| | | Latvia (1) |
|---|
| Gulbis, Ernests |
| | New Zealand (2) |
|---|
| Statham, Jose | | Venus, Michael |
|
| | South Africa (1) |
|---|
| Anderson, Kevin |
| | Spain (4) |
|---|
| Bautista Agut, Roberto | | Carreno Busta, Pablo | | Garcia-Lopez, Guillermo | | Ramos-Vinolas, Albert |
| |
| United States (2) |
|---|
| Johnson, Steve | | Young, Donald |
|