| Argentina (1) |
|---|
| Pella, Guido |
| | Australia (2) |
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| Kyrgios, Nick | | Millman, John |
| | Bosnia and Herzegovina (1) |
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| Basic, Mirza |
| | Canada (2) |
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| Raonic, Milos | | Shapovalov, Denis |
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| Croatia (1) |
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| Galovic, Viktor |
| | Czech Republic (1) |
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| Berdych, Tomas |
| | France (3) |
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| Paire, Benoit | | Pouille, Lucas | | Simon, Gilles |
| | Germany (7) |
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| Kohlschreiber, Philipp | | Maden, Yannick | | Marterer, Maximilian | | Mayer, Florian | | Molleker, Rudolf | | Struff, Jan-Lennard | | Zverev, Mischa |
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| Hungary (1) |
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| Fucsovics, Marton |
| | India (1) |
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| Gunneswaran, Prajnesh |
| | | Russia (1) |
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| Youzhny, Mikhail |
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| Serbia (1) |
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| Troicki, Viktor |
| | Spain (1) |
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| Lopez, Feliciano |
| | | United States (2) |
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| Fritz, Taylor | | Kudla, Denis |
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| Uzbekistan (1) |
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| Istomin, Denis |
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