| Аргентина (5) |
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| Baez, Sebastian | | Cerundolo, Francisco | | Comesana, Francisco | | Etcheverry, Tomas Martin | | Ugo Carabelli, Camilo |
| | Бельгия (1) |
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| Collignon, Raphael |
| | Босния и Герцеговина (1) |
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| Dzumhur, Damir |
| | Канада (1) |
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| Auger-Aliassime, Felix |
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| | | | Франция (3) |
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| Monfils, Gael | | Mpetshi Perricard, Giovanni | | Muller, Alexandre |
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| Германия (5) |
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| Altmaier, Daniel | | Dedura, Diego | | Engel, Justin | | Struff, Jan-Lennard | | Zverev, Alexander |
| | Италия (2) |
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| Cobolli, Flavio | | Darderi, Luciano |
| | Казахстан (1) |
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| Bublik, Alexander |
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| Испания (3) |
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| Bautista Agut, Roberto | | Davidovich Fokina, Alejandro | | Martinez, Pedro |
| | | Украина (1) |
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| Sachko, Vitaliy |
| | Соединенные Штаты (4) |
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| Giron, Marcos | | Kovacevic, Aleksandar | | Nakashima, Brandon | | Tiafoe, Frances |
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