Argentina (4) |
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Bagnis, Facundo | Coria, Federico | Pella, Guido | Schwartzman, Diego |
| Australia (2) |
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De Minaur, Alex | Millman, John |
| | Bulgaria (1) |
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Dimitrov, Grigor |
|
Canada (3) |
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Auger-Aliassime, Felix | Raonic, Milos | Shapovalov, Denis |
| Chile (1) |
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Garin, Christian |
| Croatia (2) |
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Cilic, Marin | Coric, Borna |
| France (4) |
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Humbert, Ugo | Mannarino, Adrian | Monfils, Gael | Paire, Benoit |
|
Georgia (1) |
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Basilashvili, Nikoloz |
| Germany (2) |
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Koepfer, Dominik | Struff, Jan-Lennard |
| Greece (1) |
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Tsitsipas, Stefano |
| Italy (9) |
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Berrettini, Matteo | Caruso, Salvatore | Cecchinato, Marco | Fognini, Fabio | Mager, Gianluca | Musetti, Lorenzo | Sinner, Jannik | Sonego, Lorenzo | Travaglia, Stefano |
|
Japan (2) |
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Nishikori, Kei | Nishioka, Yoshihito |
| Kazakhstan (1) |
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Bublik, Alexander |
| | Poland (1) |
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Hurkacz, Hubert |
|
| Russia (2) |
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Khachanov, Karen | Rublev, Andrey |
| Serbia (4) |
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Djokovic, Novak | Kecmanovic, Miomir | Krajinovic, Filip | Lajovic, Dusan |
| South Africa (1) |
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Anderson, Kevin |
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Spain (5) |
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Carreno Busta, Pablo | Davidovich Fokina, Alejandro | Martinez, Pedro | Nadal, Rafael | Ramos-Vinolas, Albert |
| Switzerland (1) |
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Wawrinka, Stan |
| United Kingdom (2) |
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Edmund, Kyle | Evans, Daniel |
| United States (3) |
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Fritz, Taylor | Querrey, Sam | Sandgren, Tennys |
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