Argentina (2) |
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Del Potro, Juan Martin | Mayer, Leonardo |
| Bulgaria (1) |
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Dimitrov, Grigor |
| Cyprus (1) |
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Baghdatis, Marcos |
| |
France (2) |
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Chardy, Jeremy | Herbert, Pierre-Hugues |
| Germany (2) |
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Struff, Jan-Lennard | Zverev, Mischa |
| Hungary (1) |
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Fucsovics, Marton |
| Italy (3) |
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Bolelli, Simone | Fognini, Fabio | Giannessi, Alessandro |
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| Netherlands (1) |
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Haase, Robin |
| Poland (1) |
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Janowicz, Jerzy |
| |
Serbia (1) |
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Troicki, Viktor |
| Slovakia (2) |
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Gombos, Norbert | Lacko, Lukas |
| South Africa (1) |
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Anderson, Kevin |
| South Korea (1) |
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Chung, Hyeon |
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Spain (1) |
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Verdasco, Fernando |
| Sweden (2) |
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Ymer, Elias | Ymer, Mikael |
| | United States (1) |
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Sock, Jack |
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Uzbekistan (1) |
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Istomin, Denis |
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