| Аргентина (8) |
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| Baez, Sebastian | | Bagnis, Facundo | | Cachin, Pedro | | Cerundolo, Francisco | | Coria, Federico | | Etcheverry, Tomas Martin | | Pella, Guido | | Schwartzman, Diego |
| | Австралия (7) |
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| De Minaur, Alex | | Kokkinakis, Thanasi | | Kubler, Jason | | O'Connell, Christopher | | Popyrin, Alexei | | Thompson, Jordan | | Vukic, Aleksandar |
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| Thiem, Dominic |
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| Ivashka, Ilya |
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| Meligeni Alves, Felipe | | Monteiro, Thiago |
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| Dimitrov, Grigor |
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| Auger-Aliassime, Felix | | Shapovalov, Denis |
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| Galan, Daniel Elahi |
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| Ruusuvuori, Emil |
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| Barrere, Gregoire | | Gasquet, Richard | | Halys, Quentin | | Humbert, Ugo | | Mannarino, Adrian | | Monfils, Gael | | Paire, Benoit | | Rinderknech, Arthur |
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| Германия (4) |
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| Altmaier, Daniel | | Otte, Oscar | | Struff, Jan-Lennard | | Zverev, Alexander |
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| Tsitsipas, Stefanos |
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| Япония (3) |
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| Daniel, Taro | | Nishioka, Yoshihito | | Watanuki, Yosuke |
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| Bublik, Alexander |
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| Zandschulp, Botic van de |
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| Djere, Laslo | | Kecmanovic, Miomir | | Lajovic, Dusan |
| | | Испания (8) |
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| Alcaraz, Carlos | | Bautista Agut, Roberto | | Carballes Baena, Roberto | | Davidovich Fokina, Alejandro | | Martinez, Pedro | | Munar, Jaume | | Ramos-Vinolas, Albert | | Zapata Miralles, Bernabe |
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| Huesler, Marc-Andrea |
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| Edmund, Kyle | | Evans, Daniel | | Murray, Andy | | Norrie, Cameron |
| | Соединенные Штаты (14) |
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| Cressy, Maxime | | Eubanks, Christopher | | Fritz, Taylor | | Giron, Marcos | | Isner, John | | Kovacevic, Aleksandar | | Kudla, Denis | | McDonald, Mackenzie | | Nakashima, Brandon | | Nava, Emilio | | Paul, Tommy | | Shelton, Ben | | Tiafoe, Frances | | Wolf, J.J. |
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