| Argentina (3) |
|---|
| Delbonis, Federico | | Pella, Guido | | Schwartzman, Diego |
| | Belgium (3) |
|---|
| Coppejans, Kimmer | | Darcis, Steve | | Goffin, David |
| | | France (6) |
|---|
| Barrere, Gregoire | | Gasquet, Richard | | Humbert, Ugo | | Monfils, Gael | | Simon, Gilles | | Tsonga, Jo-Wilfried |
|
| Germany (3) |
|---|
| Gojowczyk, Peter | | Maden, Yannick | | Struff, Jan-Lennard |
| | Italy (2) |
|---|
| Sinner, Jannik | | Sonego, Lorenzo |
| | Poland (1) |
|---|
| Majchrzak, Kamil |
| |
| Slovakia (1) |
|---|
| Kovalik, Jozef |
| | South Korea (1) |
|---|
| Kwon, Soonwoo |
| | Spain (1) |
|---|
| Lopez, Feliciano |
| | Switzerland (1) |
|---|
| Wawrinka, Stan |
|
| United Kingdom (2) |
|---|
| Murray, Andy | | Norrie, Cameron |
| | United States (1) |
|---|
| Tiafoe, Frances |
| |