| Австралия (1) |
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| De Minaur, Alex |
| | Беларусь (1) |
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| Gerasimov, Egor |
| | | Болгария (2) |
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| Andreev, Adrian | | Kuzmanov, Dimitar |
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| Чехия (2) |
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| Vesely, Jiri | | Vrbensky, Michael |
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| Ruusuvuori, Emil |
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| Chardy, Jeremy | | Grenier, Hugo | | Herbert, Pierre-Hugues | | Lamasine, Tristan |
| | Грузия (1) |
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| Basilashvili, Nikoloz |
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| Германия (3) |
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| Bachinger, Matthias | | Kuhn, Nicola | | Struff, Jan-Lennard |
| | Италия (5) |
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| Arnaboldi, Andrea | | Berrettini, Matteo | | Caruso, Salvatore | | Fognini, Fabio | | Travaglia, Stefano |
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| Bublik, Alexander |
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| Djere, Laslo | | Kecmanovic, Miomir |
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| Celikbilek, Altug | | Ilhan, Marsel | | Kirkin, Ergi |
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