| Аргентина (11) |
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| Baez, Sebastian | | Bagnis, Facundo | | Cachin, Pedro | | Cerundolo, Francisco | | Coria, Federico | | Delbonis, Federico | | Etcheverry, Tomas Martin | | Londero, Juan Ignacio | | Rodriguez Taverna, Santiago | | Schwartzman, Diego | | Ugo Carabelli, Camilo |
| | Австралия (8) |
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| De Minaur, Alex | | Duckworth, James | | Kokkinakis, Thanasi | | Kubler, Jason | | Millman, John | | O'Connell, Christopher | | Popyrin, Alexei | | Thompson, Jordan |
| | Австрия (2) |
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| Ofner, Sebastian | | Thiem, Dominic |
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| Ivashka, Ilya |
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| | | Болгария (1) |
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| Dimitrov, Grigor |
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| Auger-Aliassime, Felix | | Shapovalov, Denis |
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| Garin, Christian | | Tabilo, Alejandro |
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| Cilic, Marin | | Coric, Borna | | Gojo, Borna |
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| Kolar, Zdenek | | Lehecka, Jiri | | Vesely, Jiri |
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| Финляндия (1) |
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| Ruusuvuori, Emil |
| | Франция (15) |
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| Barrere, Gregoire | | Blancaneaux, Geoffrey | | Bonzi, Benjamin | | Gasquet, Richard | | Gaston, Hugo | | Guinard, Manuel | | Halys, Quentin | | Humbert, Ugo | | Mannarino, Adrian | | Moutet, Corentin | | Paire, Benoit | | Pouille, Lucas | | Rinderknech, Arthur | | Simon, Gilles | | Tsonga, Jo-Wilfried |
| | Грузия (1) |
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| Basilashvili, Nikoloz |
| | Германия (4) |
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| Altmaier, Daniel | | Gojowczyk, Peter | | Otte, Oscar | | Zverev, Alexander |
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| Греция (1) |
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| Tsitsipas, Stefanos |
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| Balazs, Attila | | Fucsovics, Marton |
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| Agamenone, Franco | | Cecchinato, Marco | | Fognini, Fabio | | Giannessi, Alessandro | | Musetti, Lorenzo | | Sinner, Jannik | | Sonego, Lorenzo | | Zeppieri, Giulio |
| | Япония (2) |
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| Daniel, Taro | | Nishioka, Yoshihito |
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| Bublik, Alexander |
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| Griekspoor, Tallon | | Zandschulp, Botic van de |
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| Varillas, Juan Pablo |
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| Borges, Nuno | | Sousa, Joao |
| | Россия (6) |
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| Karatsev, Aslan | | Khachanov, Karen | | Kotov, Pavel | | Kuznetsov, Andrey | | Medvedev, Daniil | | Rublev, Andrey |
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| Сербия (5) |
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| Djere, Laslo | | Djokovic, Novak | | Kecmanovic, Miomir | | Krajinovic, Filip | | Lajovic, Dusan |
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| Gombos, Norbert | | Molcan, Alex |
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| Bedene, Aljaz |
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| Harris, Lloyd |
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| Kwon, Soonwoo |
| | Испания (11) |
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| Alcaraz, Carlos | | Andujar, Pablo | | Carballes Baena, Roberto | | Carreno Busta, Pablo | | Davidovich Fokina, Alejandro | | Martinez, Pedro | | Munar, Jaume | | Nadal, Rafael | | Ramos-Vinolas, Albert | | Taberner, Carlos | | Zapata Miralles, Bernabe |
| | | Швейцария (2) |
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| Laaksonen, Henri | | Wawrinka, Stan |
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| Тайвань (1) |
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| Tseng, Chun-Hsin |
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| Evans, Daniel | | Norrie, Cameron |
| | Соединенные Штаты (15) |
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| Brooksby, Jenson | | Cressy, Maxime | | Fratangelo, Bjorn | | Fritz, Taylor | | Giron, Marcos | | Isner, John | | Johnson, Steve | | Korda, Sebastian | | Kudla, Denis | | McDonald, Mackenzie | | Mmoh, Michael | | Nakashima, Brandon | | Opelka, Reilly | | Paul, Tommy | | Tiafoe, Frances |
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