| Argentina (1) |
|---|
| Londero, Juan Ignacio |
| | Australia (4) |
|---|
| De Minaur, Alex | | Millman, John | | Popyrin, Alexei | | Thompson, Jordan |
| | | Canada (1) |
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| Shapovalov, Denis |
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| Croazia (2) |
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| Cilic, Marin | | Coric, Borna |
| | Francia (4) |
|---|
| Mannarino, Adrian | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles |
| | Germania (1) |
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| Struff, Jan-Lennard |
| | Italia (1) |
|---|
| Sonego, Lorenzo |
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| Giappone (5) |
|---|
| Daniel, Taro | | Nishioka, Yoshihito | | Soeda, Go | | Sugita, Yuichi | | Uchiyama, Yasutaka |
| | | Polonia (1) |
|---|
| Hurkacz, Hubert |
| | Portogallo (1) |
|---|
| Sousa, Joao |
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| Serbia (3) |
|---|
| Djokovic, Novak | | Kecmanovic, Miomir | | Krajinovic, Filip |
| | Sud Africa (1) |
|---|
| Harris, Lloyd |
| | Corea del Sud (1) |
|---|
| Chung, Hyeon |
| | Spagna (2) |
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| Andujar, Pablo | | Carreno Busta, Pablo |
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| Stati Uniti (2) |
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| Fritz, Taylor | | Opelka, Reilly |
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