| Argentina (2) |
|---|
| Del Potro, Juan Martin | | Delbonis, Federico |
| | Australien (2) |
|---|
| Barty, Ashleigh | | Thompson, Jordan |
| | Hviderusland (2) |
|---|
| Azarenka, Victoria | | Sabalenka, Aryna |
| |
| Kroatien (1) |
|---|
| Karlovic, Ivo |
| | Frankrig (2) |
|---|
| Pouille, Lucas | | Simon, Gilles |
| | Italien (2) |
|---|
| Caruso, Salvatore | | Fognini, Fabio |
| | Japan (3) |
|---|
| Nara, Kurumi | | Nishioka, Yoshihito | | Osaka, Naomi |
|
| Marokko (1) |
|---|
| Benchetrit, Elliot |
| | | Puerto Rico (1) |
|---|
| Puig, Monica |
| | Rusland (1) |
|---|
| Kasatkina, Daria |
|
| Serbien (1) |
|---|
| Lajovic, Dusan |
| | Slovakiet (1) |
|---|
| Klizan, Martin |
| | Spanien (1) |
|---|
| Bautista Agut, Roberto |
| | Storbritannien (1) |
|---|
| Edmund, Kyle |
|
| USA (4) |
|---|
| Anisimova, Amanda | | Collins, Danielle | | Fritz, Taylor | | Williams, Serena |
| |