| Argentinië (8) |
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| Baez, Sebastian | | Cachin, Pedro | | Cerundolo, Francisco | | Cerundolo, Juan Manuel | | Diaz Acosta, Facundo | | Etcheverry, Tomas Martin | | Pella, Guido | | Schwartzman, Diego |
| | Australië (10) |
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| De Minaur, Alex | | Duckworth, James | | Hijikata, Rinky | | Kokkinakis, Thanasi | | Kubler, Jason | | O'Connell, Christopher | | Popyrin, Alexei | | Purcell, Max | | Thompson, Jordan | | Vukic, Aleksandar |
| | Oostenrijk (2) |
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| Ofner, Sebastian | | Thiem, Dominic |
| | Wit-Rusland (1) |
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| Ivashka, Ilya |
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| | Brazilië (1) |
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| Meligeni Alves, Felipe |
| | Bulgarije (1) |
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| Dimitrov, Grigor |
| | Canada (2) |
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| Auger-Aliassime, Felix | | Raonic, Milos |
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| | China (2) |
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| Wu, Yibing | | Zhang, Zhizhen |
| | Colombia (1) |
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| Galan, Daniel Elahi |
| | Kroatië (2) |
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| Coric, Borna | | Gojo, Borna |
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| Tsjechië (3) |
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| Lehecka, Jiri | | Mensik, Jakub | | Vesely, Jiri |
| | Denemarken (1) |
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| Rune, Holger |
| | Finland (2) |
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| Ruusuvuori, Emil | | Virtanen, Otto |
| | Frankrijk (17) |
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| Assche, Luca Van | | Barrere, Gregoire | | Bonzi, Benjamin | | Cazaux, Arthur | | Couacaud, Enzo | | Droguet, Titouan | | Fils, Arthur | | Gasquet, Richard | | Gaston, Hugo | | Halys, Quentin | | Humbert, Ugo | | Lestienne, Constant | | Mannarino, Adrian | | Monfils, Gael | | Moutet, Corentin | | Muller, Alexandre | | Rinderknech, Arthur |
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| Duitsland (4) |
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| Altmaier, Daniel | | Hanfmann, Yannick | | Koepfer, Dominik | | Zverev, Alexander |
| | Griekenland (1) |
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| Tsitsipas, Stefanos |
| | Hongarije (3) |
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| Balazs, Attila | | Fucsovics, Marton | | Marozsan, Fabian |
| | Italië (7) |
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| Arnaldi, Matteo | | Berrettini, Matteo | | Cecchinato, Marco | | Musetti, Lorenzo | | Sinner, Jannik | | Sonego, Lorenzo | | Travaglia, Stefano |
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| Japan (4) |
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| Daniel, Taro | | Nishioka, Yoshihito | | Shimabukuro, Sho | | Watanuki, Yosuke |
| | Kazachstan (3) |
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| Bublik, Alexander | | Shevchenko, Alexander | | Skatov, Timofey |
| | | Nederland (2) |
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| Griekspoor, Tallon | | Zandschulp, Botic van de |
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| Noorwegen (1) |
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| Ruud, Casper |
| | Peru (1) |
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| Varillas, Juan Pablo |
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| Rusland (6) |
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| Karatsev, Aslan | | Khachanov, Karen | | Kotov, Pavel | | Medvedev, Daniil | | Rublev, Andrey | | Safiullin, Roman |
| | Servië (4) |
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| Djere, Laslo | | Djokovic, Novak | | Kecmanovic, Miomir | | Lajovic, Dusan |
| | Slowakije (1) |
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| Molcan, Alex |
| | Zuid-Afrika (1) |
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| Harris, Lloyd |
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| Zuid-Korea (1) |
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| Kwon, Soonwoo |
| | Spanje (5) |
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| Alcaraz, Carlos | | Carballes Baena, Roberto | | Davidovich Fokina, Alejandro | | Ramos-Vinolas, Albert | | Zapata Miralles, Bernabe |
| | Zwitserland (3) |
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| Huesler, Marc-Andrea | | Stricker, Dominic | | Wawrinka, Stan |
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| Verenigd Koninkrijk (4) |
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| Draper, Jack | | Evans, Daniel | | Murray, Andy | | Norrie, Cameron |
| | Verenigde Staten (19) |
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| Eubanks, Christopher | | Fritz, Taylor | | Giron, Marcos | | Isner, John | | Johnson, Steve | | Korda, Sebastian | | McDonald, Mackenzie | | Michelsen, Alex | | Mmoh, Michael | | Moreno De Alboran, Nicolas | | Nakashima, Brandon | | Nava, Emilio | | Paul, Tommy | | Quinn, Ethan | | Shelton, Ben | | Svajda, Zachary | | Tiafoe, Frances | | Tien, Learner | | Wolf, J.J. |
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