| Argentinië (6) |
|---|
| Andreozzi, Guido | | Delbonis, Federico | | Londero, Juan Ignacio | | Mayer, Leonardo | | Pella, Guido | | Schwartzman, Diego |
| | Oostenrijk (1) |
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| Thiem, Dominic |
| | |
| Bulgarije (1) |
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| Dimitrov, Grigor |
| | Canada (2) |
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| Auger-Aliassime, Felix | | Shapovalov, Denis |
| | Chili (2) |
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| Garin, Christian | | Jarry, Nicolas |
| | Frankrijk (3) |
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| Paire, Benoit | | Pouille, Lucas | | Simon, Gilles |
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| Duitsland (5) |
|---|
| Kohlschreiber, Philipp | | Kuhn, Nicola | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
| | Griekenland (1) |
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| Tsitsipas, Stefano |
| | Hongarije (1) |
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| Fucsovics, Marton |
| |
| Japan (3) |
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| Daniel, Taro | | Nishikori, Kei | | Nishioka, Yoshihito |
| | Portugal (2) |
|---|
| Sousa, Joao | | Sousa, Pedro |
| | Roemenië (1) |
|---|
| Copil, Marius |
| | Rusland (2) |
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| Khachanov, Karen | | Medvedev, Daniil |
|
| Slowakije (1) |
|---|
| Klizan, Martin |
| | Spanje (9) |
|---|
| Carballes Baena, Roberto | | Carreno Busta, Pablo | | Ferrer, David | | Granollers, Marcel | | Lopez, Feliciano | | Munar, Jaume | | Nadal, Rafael | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
| | | Verenigd Koninkrijk (1) |
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| Norrie, Cameron |
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| Verenigde Staten (5) |
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| Fritz, Taylor | | Kudla, Denis | | McDonald, Mackenzie | | Opelka, Reilly | | Tiafoe, Frances |
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