Argentina (2) |
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Mayer, Leonardo | Pella, Guido |
| Australia (1) |
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Popyrin, Alexei |
| | |
| Tsjekkisk Republikk (1) |
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Pliskova, Karolina |
| Danmark (1) |
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Wozniacki, Caroline |
| Estland (1) |
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Kontaveit, Anett |
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Frankrike (2) |
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Chardy, Jeremy | Paire, Benoit |
| Italia (2) |
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Fabbiano, Thomas | Seppi, Andreas |
| Latvia (1) |
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Sevastova, Anastasija |
| Nederland (1) |
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Haase, Robin |
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| Puerto Rico (1) |
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Puig, Monica |
| Russland (4) |
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Gasparyan, Margarita | Khachanov, Karen | Kudermetova, Veronika | Medvedev, Daniil |
| Serbia (1) |
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Kecmanovic, Miomir |
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Slovakia (1) |
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Rybarikova, Magdalena |
| Spania (2) |
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Lopez, Feliciano | Verdasco, Fernando |
| Ukraina (2) |
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Svitolina, Elina | Yastremska, Dayana |
| England (2) |
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Edmund, Kyle | Watson, Heather |
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Amerika (3) |
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Collins, Danielle | Gauff, Cori | Kenin, Sofia |
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