Argentina (4) |
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Berlocq, Carlos | Delbonis, Federico | Olivo, Renzo | Schwartzman, Diego |
| Australia (1) |
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Tomic, Bernard |
| Austria (1) |
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Thiem, Dominic |
| Belgio (2) |
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Darcis, Steve | Goffin, David |
|
Bosnia-Erzegovina (1) |
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Dzumhur, Damir |
| Bulgaria (1) |
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Dimitrov, Grigor |
| Croazia (2) |
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Cilic, Marin | Coric, Borna |
| Repubblica Ceca (2) |
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Berdych, Tomas | Vesely, Jiri |
|
Francia (8) |
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Chardy, Jeremy | Herbert, Pierre-Hugues | Mahut, Nicolas | Mannarino, Adrian | Paire, Benoit | Pouille, Lucas | Simon, Gilles | Tsonga, Jo-Wilfried |
| Georgia (1) |
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Basilashvili, Nikoloz |
| Germania (6) |
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Haas, Tommy | Kohlschreiber, Philipp | Mayer, Florian | Struff, Jan-Lennard | Zverev, Alexander | Zverev, Mischa |
| Italia (3) |
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Fognini, Fabio | Lorenzi, Paolo | Seppi, Andreas |
|
Lussemburgo (1) |
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Muller, Gilles |
| | | Portogallo (1) |
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Sousa, Joao |
|
Russia (3) |
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Khachanov, Karen | Kuznetsov, Andrey | Medvedev, Daniil |
| Serbia (2) |
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Djokovic, Novak | Troicki, Viktor |
| Slovacchia (1) |
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Klizan, Martin |
| Spagna (9) |
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Almagro, Nicolas | Bautista Agut, Roberto | Carreno Busta, Pablo | Garcia-Lopez, Guillermo | Granollers, Marcel | Lopez, Feliciano | Nadal, Rafael | Ramos-Vinolas, Albert | Robredo, Tommy |
|
Svizzera (1) |
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Wawrinka, Stan |
| | Regno Unito (3) |
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Edmund, Kyle | Evans, Daniel | Murray, Andy |
| Stati Uniti (1) |
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Harrison, Ryan |
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