| Аргентина (4) |
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| Baez, Sebastian | | Cachin, Pedro | | Cerundolo, Francisco | | Trungelliti, Marco |
| | Австрия (1) |
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| Thiem, Dominic |
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| Ivashka, Ilya |
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| Monteiro, Thiago |
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| Франция (4) |
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| Bonzi, Benjamin | | Guinard, Manuel | | Lestienne, Constant | | Rinderknech, Arthur |
| | | Португалия (1) |
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| Sousa, Joao |
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| Rublev, Andrey | | Vatutin, Alexey |
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| Испания (9) |
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| Alvarez Varona, Nicolas | | Bautista Agut, Roberto | | Carreno Busta, Pablo | | Davidovich Fokina, Alejandro | | Landaluce, Martin | | Lopez, Feliciano | | Munar, Jaume | | Ramos-Vinolas, Albert | | Taberner, Carlos |
| | Великобритания (1) |
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| Murray, Andy |
| | Соединенные Штаты (3) |
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| Giron, Marcos | | Korda, Sebastian | | Paul, Tommy |
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