Argentinië (4) |
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Del Potro, Juan Martin | Delbonis, Federico | Mayer, Leonardo | Schwartzman, Diego |
| Australië (4) |
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Barty, Ashleigh | Gavrilova, Daria | Stosur, Samantha | Tomljanovic, Ajla |
| Oostenrijk (1) |
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Thiem, Dominic |
| Wit-Rusland (2) |
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Azarenka, Victoria | Sabalenka, Aryna |
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België (2) |
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Goffin, David | Uytvanck, Alison Van |
| Bosnië-Herzegovina (1) |
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Dzumhur, Damir |
| Bulgarije (1) |
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Dimitrov, Grigor |
| Canada (1) |
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Shapovalov, Denis |
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| China (2) |
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Peng, Shuai | Zhang, Shuai |
| Kroatië (4) |
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Cilic, Marin | Coric, Borna | Martic, Petra | Vekic, Donna |
| Tsjechië (3) |
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Berdych, Tomas | Pliskova, Karolina | Strycova, Barbora |
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Denemarken (1) |
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Wozniacki, Caroline |
| Estland (2) |
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Kanepi, Kaia | Kontaveit, Anett |
| Frankrijk (7) |
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Garcia, Caroline | Gasquet, Richard | Mannarino, Adrian | Mladenovic, Kristina | Monfils, Gael | Paire, Benoit | Pouille, Lucas |
| Georgië (1) |
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Basilashvili, Nikoloz |
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Duitsland (5) |
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Gojowczyk, Peter | Kerber, Angelique | Kohlschreiber, Philipp | Siegemund, Laura | Zverev, Alexander |
| Griekenland (2) |
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Sakkari, Maria | Tsitsipas, Stefano |
| Hongarije (1) |
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Babos, Timea |
| Italië (10) |
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Baldi, Filippo | Berrettini, Matteo | Cecchinato, Marco | Errani, Sara | Fognini, Fabio | Rosatello, Camilla | Schiavone, Francesca | Seppi, Andreas | Sonego, Lorenzo | Vinci, Roberta |
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Japan (3) |
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Nishikori, Kei | Osaka, Naomi | Sugita, Yuichi |
| Kazachstan (1) |
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Diyas, Zarina |
| Letland (2) |
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Ostapenko, Jelena | Sevastova, Anastasija |
| Luxemburg (1) |
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Muller, Gilles |
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Nederland (2) |
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Bertens, Kiki | Haase, Robin |
| Roemenië (4) |
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Begu, Irina-Camelia | Buzarnescu, Mihaela | Cirstea, Sorana | Halep, Simona |
| Rusland (8) |
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Kasatkina, Daria | Khachanov, Karen | Kuznetsova, Svetlana | Medvedev, Daniil | Pavlyuchenkova, Anastasia | Sharapova, Maria | Vesnina, Elena | Vikhlyantseva, Natalia |
| Servië (2) |
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Djokovic, Novak | Krunic, Aleksandra |
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Slowakije (2) |
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Cibulkova, Dominika | Rybarikova, Magdalena |
| Slovenië (2) |
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Bedene, Aljaz | Hercog, Polona |
| Zuid-Afrika (1) |
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Anderson, Kevin |
| Spanje (8) |
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Carreno Busta, Pablo | Ferrer, David | Lopez, Feliciano | Muguruza, Garbiñe | Nadal, Rafael | Ramos-Vinolas, Albert | Suárez Navarro, Carla | Verdasco, Fernando |
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Zwitserland (1) |
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Wawrinka, Stan |
| | | Oekraïne (3) |
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Dolgopolov, Alexandr | Svitolina, Elina | Tsurenko, Lesia |
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Verenigd Koninkrijk (2) |
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Edmund, Kyle | Konta, Johanna |
| Verenigde Staten (12) |
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Collins, Danielle | Donaldson, Jared | Harrison, Ryan | Isner, John | Johnson, Steve | Keys, Madison | Querrey, Sam | Sock, Jack | Stephens, Sloane | Tiafoe, Frances | Vandeweghe, Coco | Williams, Venus |
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