| Argentinië (3) |
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| Delbonis, Federico | | Pella, Guido | | Schwartzman, Diego |
| | Australië (1) |
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| De Minaur, Alex |
| | | Bulgarije (1) |
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| Dimitrov, Grigor |
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| Canada (2) |
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| Auger-Aliassime, Felix | | Shapovalov, Denis |
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| Garin, Christian |
| | | Frankrijk (5) |
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| Gasquet, Richard | | Humbert, Ugo | | Monfils, Gael | | Moutet, Corentin | | Paire, Benoit |
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| Georgië (1) |
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| Basilashvili, Nikoloz |
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| Koepfer, Dominik | | Struff, Jan-Lennard | | Zverev, Alexander |
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| Tsitsipas, Stefanos |
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| Fucsovics, Marton |
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| Italië (4) |
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| Berrettini, Matteo | | Fognini, Fabio | | Sinner, Jannik | | Sonego, Lorenzo |
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| Nishioka, Yoshihito |
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| Bublik, Alexander |
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| Ruud, Casper |
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| Karatsev, Aslan | | Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
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| Djere, Laslo | | Kecmanovic, Miomir | | Krajinovic, Filip | | Lajovic, Dusan |
| | Zuid-Afrika (2) |
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| Anderson, Kevin | | Harris, Lloyd |
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| Spanje (5) |
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| Alcaraz, Carlos | | Bautista Agut, Roberto | | Carreno Busta, Pablo | | Davidovich Fokina, Alejandro | | Ramos-Vinolas, Albert |
| | Verenigd Koninkrijk (3) |
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| Evans, Daniel | | Murray, Andy | | Norrie, Cameron |
| | Verenigde Staten (9) |
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| Fritz, Taylor | | Giron, Marcos | | Isner, John | | Korda, Sebastian | | McDonald, Mackenzie | | Nakashima, Brandon | | Opelka, Reilly | | Paul, Tommy | | Tiafoe, Frances |
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