Argentinië (3) |
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Del Potro, Juan Martin | Mayer, Leonardo | Schwartzman, Diego |
| Australië (4) |
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Barty, Ashleigh | Gavrilova, Daria | Kyrgios, Nick | Tomljanovic, Ajla |
| Oostenrijk (1) |
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Thiem, Dominic |
| Wit-Rusland (3) |
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Azarenka, Victoria | Sabalenka, Aryna | Sasnovich, Aliaksandra |
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België (2) |
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Goffin, David | Mertens, Elise |
| Bosnië-Herzegovina (1) |
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Dzumhur, Damir |
| Bulgarije (1) |
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Dimitrov, Grigor |
| Canada (2) |
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Raonic, Milos | Shapovalov, Denis |
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Kroatië (3) |
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Cilic, Marin | Coric, Borna | Martic, Petra |
| Tsjechië (5) |
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Kvitova, Petra | Pliskova, Karolina | Siniakova, Katerina | Strycova, Barbora | Vondrousova, Marketa |
| Denemarken (1) |
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Wozniacki, Caroline |
| Estland (2) |
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Kanepi, Kaia | Kontaveit, Anett |
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Frankrijk (8) |
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Chardy, Jeremy | Cornet, Alizé | Garcia, Caroline | Gasquet, Richard | Mannarino, Adrian | Mladenovic, Kristina | Paire, Benoit | Pouille, Lucas |
| Duitsland (8) |
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Goerges, Julia | Gojowczyk, Peter | Kerber, Angelique | Kohlschreiber, Philipp | Maria, Tatjana | Marterer, Maximilian | Zverev, Alexander | Zverev, Mischa |
| Griekenland (2) |
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Sakkari, Maria | Tsitsipas, Stefano |
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Babos, Timea | Fucsovics, Marton |
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Italië (2) |
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Cecchinato, Marco | Giorgi, Camila |
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Nishikori, Kei | Osaka, Naomi |
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Ostapenko, Jelena | Sevastova, Anastasija |
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Bertens, Kiki | Haase, Robin |
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Polen (2) |
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Hurkacz, Hubert | Radwanska, Agnieszka |
| | Roemenië (4) |
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Begu, Irina-Camelia | Bogdan, Ana | Copil, Marius | Halep, Simona |
| Rusland (7) |
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Kasatkina, Daria | Khachanov, Karen | Kuznetsova, Svetlana | Makarova, Ekaterina | Medvedev, Daniil | Pavlyuchenkova, Anastasia | Rublev, Andrey |
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Servië (4) |
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Djokovic, Novak | Krajinovic, Filip | Krunic, Aleksandra | Lajovic, Dusan |
| Slowakije (2) |
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Kuzmova, Viktoria | Rybarikova, Magdalena |
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Anderson, Kevin |
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Chung, Hyeon |
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Spanje (7) |
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Carreno Busta, Pablo | Ferrer, David | Garcia-Lopez, Guillermo | Muguruza, Garbiñe | Ramos-Vinolas, Albert | Suárez Navarro, Carla | Verdasco, Fernando |
| Zweden (1) |
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Peterson, Rebecca |
| Zwitserland (3) |
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Federer, Roger | Voegele, Stefanie | Wawrinka, Stan |
| |
Oekraïne (2) |
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Svitolina, Elina | Tsurenko, Lesia |
| Verenigd Koninkrijk (3) |
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Edmund, Kyle | Konta, Johanna | Murray, Andy |
| Verenigde Staten (18) |
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Anisimova, Amanda | Collins, Danielle | Isner, John | Johnson, Steve | Keys, Madison | Kiick, Allie | Klahn, Bradley | Kudla, Denis | Lepchenko, Varvara | Mattek-Sands, Bethanie | McDonald, Mackenzie | Mmoh, Michael | Querrey, Sam | Sock, Jack | Stephens, Sloane | Tiafoe, Frances | Vandeweghe, Coco | Williams, Serena |
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