| Argentina (7) |
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| Bagnis, Facundo | | Coria, Federico | | Delbonis, Federico | | Londero, Juan Ignacio | | Pella, Guido | | Schwartzman, Diego | | Trungelliti, Marco |
| | Austrália (9) |
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| Bolt, Alex | | De Minaur, Alex | | Duckworth, James | | Kyrgios, Nick | | Millman, John | | O'Connell, Christopher | | Polmans, Marc | | Popyrin, Alexei | | Thompson, Jordan |
| | | Bielorrússia (2) |
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| Gerasimov, Egor | | Ivashka, Ilya |
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| Brasil (1) |
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| Monteiro, Thiago |
| | Bulgária (1) |
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| Dimitrov, Grigor |
| | Canadá (3) |
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| Auger-Aliassime, Felix | | Pospisil, Vasek | | Shapovalov, Denis |
| | Chile (2) |
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| Barrios Vera, Marcelo Tomas | | Garin, Christian |
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| | Colômbia (1) |
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| Galan, Daniel Elahi |
| | | República Checa (1) |
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| Vesely, Jiri |
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| Finlândia (1) |
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| Ruusuvuori, Emil |
| | França (15) |
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| Barrere, Gregoire | | Bonzi, Benjamin | | Chardy, Jeremy | | Gasquet, Richard | | Herbert, Pierre-Hugues | | Hoang, Antoine | | Humbert, Ugo | | Mannarino, Adrian | | Monfils, Gael | | Moutet, Corentin | | Paire, Benoit | | Pouille, Lucas | | Rinderknech, Arthur | | Simon, Gilles | | Tsonga, Jo-Wilfried |
| | Geórgia (1) |
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| Basilashvili, Nikoloz |
| | Alemanha (7) |
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| Hanfmann, Yannick | | Koepfer, Dominik | | Kohlschreiber, Philipp | | Masur, Daniel | | Otte, Oscar | | Struff, Jan-Lennard | | Zverev, Alexander |
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| Grécia (1) |
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| Tsitsipas, Stefanos |
| | Hungria (1) |
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| Fucsovics, Marton |
| | Itália (10) |
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| Berrettini, Matteo | | Caruso, Salvatore | | Cecchinato, Marco | | Fognini, Fabio | | Mager, Gianluca | | Musetti, Lorenzo | | Seppi, Andreas | | Sinner, Jannik | | Sonego, Lorenzo | | Travaglia, Stefano |
| | Japão (4) |
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| Nishikori, Kei | | Nishioka, Yoshihito | | Sugita, Yuichi | | Uchiyama, Yasutaka |
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| Cazaquistão (2) |
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| Bublik, Alexander | | Kukushkin, Mikhail |
| | Lituânia (1) |
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| Berankis, Ricardas |
| | | Holanda (2) |
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| Griekspoor, Tallon | | Zandschulp, Botic van de |
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| | Polónia (1) |
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| Hurkacz, Hubert |
| | Portugal (2) |
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| Sousa, Joao | | Sousa, Pedro |
| | Rússia (4) |
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| Karatsev, Aslan | | Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
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| Sérvia (5) |
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| Djere, Laslo | | Djokovic, Novak | | Kecmanovic, Miomir | | Krajinovic, Filip | | Lajovic, Dusan |
| | Eslováquia (1) |
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| Gombos, Norbert |
| | Eslovénia (1) |
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| Bedene, Aljaz |
| | África do Sul (2) |
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| Anderson, Kevin | | Harris, Lloyd |
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| Coreia do Sul (1) |
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| Kwon, Soonwoo |
| | Espanha (12) |
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| Alcaraz, Carlos | | Andujar, Pablo | | Bautista Agut, Roberto | | Carballes Baena, Roberto | | Carreno Busta, Pablo | | Davidovich Fokina, Alejandro | | Lopez, Feliciano | | Martinez, Pedro | | Munar, Jaume | | Ramos-Vinolas, Albert | | Verdasco, Fernando | | Zapata Miralles, Bernabe |
| | |
| | Reino Unido (6) |
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| Broady, Liam | | Clarke, Jay | | Draper, Jack | | Evans, Daniel | | Murray, Andy | | Norrie, Cameron |
| | Estados Unidos (12) |
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| Fritz, Taylor | | Giron, Marcos | | Isner, John | | Johnson, Steve | | Korda, Sebastian | | Kudla, Denis | | McDonald, Mackenzie | | Nakashima, Brandon | | Opelka, Reilly | | Querrey, Sam | | Sandgren, Tennys | | Tiafoe, Frances |
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