| Аргентина (6) |
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| Andreozzi, Guido | | Delbonis, Federico | | Londero, Juan Ignacio | | Mayer, Leonardo | | Pella, Guido | | Schwartzman, Diego |
| | Австрия (1) |
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| Thiem, Dominic |
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| Болгария (1) |
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| Dimitrov, Grigor |
| | Канада (2) |
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| Auger-Aliassime, Felix | | Shapovalov, Denis |
| | Чили (2) |
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| Garin, Christian | | Jarry, Nicolas |
| | Франция (3) |
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| Paire, Benoit | | Pouille, Lucas | | Simon, Gilles |
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| Германия (5) |
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| Kohlschreiber, Philipp | | Kuhn, Nicola | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
| | Греция (1) |
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| Tsitsipas, Stefano |
| | Венгрия (1) |
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| Fucsovics, Marton |
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| Япония (3) |
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| Daniel, Taro | | Nishikori, Kei | | Nishioka, Yoshihito |
| | Португалия (2) |
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| Sousa, Joao | | Sousa, Pedro |
| | | Россия (2) |
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| Khachanov, Karen | | Medvedev, Daniil |
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| Словакия (1) |
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| Klizan, Martin |
| | Испания (9) |
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| Carballes Baena, Roberto | | Carreno Busta, Pablo | | Ferrer, David | | Granollers, Marcel | | Lopez, Feliciano | | Munar, Jaume | | Nadal, Rafael | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
| | | Великобритания (1) |
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| Norrie, Cameron |
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| Соединенные Штаты (5) |
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| Fritz, Taylor | | Kudla, Denis | | McDonald, Mackenzie | | Opelka, Reilly | | Tiafoe, Frances |
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