| Argentina (1) |
|---|
| Londero, Juan Ignacio |
| | Australien (4) |
|---|
| De Minaur, Alex | | Millman, John | | Popyrin, Alexei | | Thompson, Jordan |
| | | Canada (1) |
|---|
| Shapovalov, Denis |
|
| Kroatien (2) |
|---|
| Cilic, Marin | | Coric, Borna |
| | Frankrig (4) |
|---|
| Mannarino, Adrian | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles |
| | Tyskland (1) |
|---|
| Struff, Jan-Lennard |
| | Italien (1) |
|---|
| Sonego, Lorenzo |
|
| Japan (5) |
|---|
| Daniel, Taro | | Nishioka, Yoshihito | | Soeda, Go | | Sugita, Yuichi | | Uchiyama, Yasutaka |
| | | |
| Serbien (3) |
|---|
| Djokovic, Novak | | Kecmanovic, Miomir | | Krajinovic, Filip |
| | Sydafrika (1) |
|---|
| Harris, Lloyd |
| | | Spanien (2) |
|---|
| Andujar, Pablo | | Carreno Busta, Pablo |
|
| USA (2) |
|---|
| Fritz, Taylor | | Opelka, Reilly |
|