| Argentina (3) |
|---|
| Mayer, Leonardo | | Monaco, Juan | | Schwartzman, Diego |
| | | Austria (2) |
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| Haider-Maurer, Andreas | | Thiem, Dominic |
| | Belgio (1) |
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| Bemelmans, Ruben |
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| Brasile (1) |
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| Bellucci, Thomaz |
| | Canada (1) |
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| Pospisil, Vasek |
| | Colombia (1) |
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| Giraldo, Santiago |
| | Cipro (1) |
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| Baghdatis, Marcos |
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| Repubblica Ceca (1) |
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| Vesely, Jiri |
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| Estrella Burgos, Victor |
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| Zverev, Alexander | | Zverev, Mischa |
|
| | Italia (2) |
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| Bolelli, Simone | | Seppi, Andreas |
| | | Kazakistan (1) |
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| Kukushkin, Mikhail |
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| Sousa, Joao |
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| Troicki, Viktor |
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| Klizan, Martin |
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| Bedene, Aljaz |
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| Chung, Hyeon |
| | Spagna (8) |
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| Almagro, Nicolas | | Andujar, Pablo | | Carreno Busta, Pablo | | Ferrer, David | | Gimeno-Traver, Daniel | | Granollers, Marcel | | Lopez, Feliciano | | Ramos-Vinolas, Albert |
| | |
| Ucraina (2) |
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| Dolgopolov, Alexandr | | Stakhovsky, Sergiy |
| | Regno Unito (2) |
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| Edmund, Kyle | | Ward, James |
| | Stati Uniti (5) |
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| Fritz, Taylor | | Johnson, Steve | | Querrey, Sam | | Smyczek, Tim | | Young, Donald |
| |
| Usbechistan (1) |
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| Istomin, Denis |
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