| Аргентина (2) |
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| Baez, Sebastian | | Delbonis, Federico |
| | Бразилия (1) |
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| Seyboth Wild, Thiago |
| | | Франция (3) |
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| Moutet, Corentin | | Paire, Benoit | | Pouille, Lucas |
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| Грузия (1) |
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| Basilashvili, Nikoloz |
| | Германия (6) |
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| Altmaier, Daniel | | Koepfer, Dominik | | Kohlschreiber, Philipp | | Kuhn, Nicola | | Marterer, Maximilian | | Struff, Jan-Lennard |
| | Греция (1) |
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| Tsitsipas, Stefanos |
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| Mager, Gianluca |
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| Berankis, Ricardas |
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| Varillas, Juan Pablo |
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| Djere, Laslo | | Krajinovic, Filip | | Lajovic, Dusan |
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| | Испания (5) |
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| Carreno Busta, Pablo | | Lopez, Feliciano | | Munar, Jaume | | Ramos-Vinolas, Albert | | Taberner, Carlos |
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