| Argentina (5) |
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| Baez, Sebastian | | Cachin, Pedro | | Cerundolo, Francisco | | Etcheverry, Tomas Martin | | Schwartzman, Diego |
| | Austrálie (11) |
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| De Minaur, Alex | | Duckworth, James | | Hijikata, Rinky | | Kokkinakis, Thanasi | | O'Connell, Christopher | | Popyrin, Alexei | | Purcell, Max | | Sekulic, Philip | | Sweeny, Dane | | Thompson, Jordan | | Vukic, Aleksandar |
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| Ofner, Sebastian |
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| Dimitrov, Grigor |
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| Auger-Aliassime, Felix |
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| Garin, Christian | | Jarry, Nicolas |
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| Bu, Yunchaokete | | Shang, Juncheng | | Te, Rigele | | Zhang, Zhizhen |
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| Galan, Daniel Elahi |
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| Lehecka, Jiri |
| | | Francie (11) |
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| Assche, Luca Van | | Atmane, Terence | | Barrere, Gregoire | | Fils, Arthur | | Gasquet, Richard | | Halys, Quentin | | Humbert, Ugo | | Mannarino, Adrian | | Moutet, Corentin | | Muller, Alexandre | | Rinderknech, Arthur |
| | Německo (4) |
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| Altmaier, Daniel | | Hanfmann, Yannick | | Struff, Jan-Lennard | | Zverev, Alexander |
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| Tsitsipas, Stefanos |
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| Arnaldi, Matteo | | Fognini, Fabio | | Musetti, Lorenzo | | Napolitano, Stefano | | Sinner, Jannik | | Sonego, Lorenzo |
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| Daniel, Taro | | Nishioka, Yoshihito | | Watanuki, Yosuke |
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| Kazachstán (4) |
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| Kukushkin, Mikhail | | Shevchenko, Alexander | | Yevseyev, Denis | | Zhukayev, Beibit |
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| Varillas, Juan Pablo |
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| Borges, Nuno |
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| Djere, Laslo | | Kecmanovic, Miomir | | Lajovic, Dusan |
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| Španělsko (5) |
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| Evans, Daniel | | Murray, Andy | | Norrie, Cameron |
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| USA (11) |
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| Eubanks, Christopher | | Fritz, Taylor | | Giron, Marcos | | Korda, Sebastian | | Kovacevic, Aleksandar | | McDonald, Mackenzie | | Nakashima, Brandon | | Paul, Tommy | | Shelton, Ben | | Tiafoe, Frances | | Wolf, J.J. |
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