| Argentina (1) |
|---|
| Delbonis, Federico |
| | Australien (1) |
|---|
| Tomljanovic, Ajla |
| | Hviderusland (1) |
|---|
| Azarenka, Victoria |
| | Canada (1) |
|---|
| Fernandez, Leylah |
|
| Tjekkiet (1) |
|---|
| Siniakova, Katerina |
| | | Grækenland (1) |
|---|
| Tsitsipas, Stefanos |
| | Ungarn (1) |
|---|
| Fucsovics, Marton |
|
| Italien (2) |
|---|
| Fognini, Fabio | | Trevisan, Martina |
| | | Holland (1) |
|---|
| Zandschulp, Botic van de |
| | Rumænien (1) |
|---|
| Cirstea, Sorana |
|
| Rusland (5) |
|---|
| Kasatkina, Daria | | Khachanov, Karen | | Kudermetova, Veronika | | Medvedev, Daniil | | Pavlyuchenkova, Anastasia |
| | Serbien (3) |
|---|
| Djere, Laslo | | Kecmanovic, Miomir | | Krajinovic, Filip |
| | Spanien (4) |
|---|
| Andujar, Pablo | | Davidovich Fokina, Alejandro | | Martinez, Pedro | | Munar, Jaume |
| | Schweizisk (1) |
|---|
| Bencic, Belinda |
|
| USA (4) |
|---|
| Isner, John | | Keys, Madison | | Opelka, Reilly | | Paul, Tommy |
|