| Argentina (4) |
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| Del Potro, Juan Martin | | Delbonis, Federico | | Mayer, Leonardo | | Schwartzman, Diego |
| | Austrálie (4) |
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| Barty, Ashleigh | | Gavrilova, Daria | | Stosur, Samantha | | Tomljanovic, Ajla |
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| Thiem, Dominic |
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| Goffin, David | | Uytvanck, Alison Van |
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| Dzumhur, Damir |
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| Dimitrov, Grigor |
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| Shapovalov, Denis |
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| | Čína (2) |
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| Peng, Shuai | | Zhang, Shuai |
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| Cilic, Marin | | Coric, Borna | | Martic, Petra | | Vekic, Donna |
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| Berdych, Tomas | | Pliskova, Karolina | | Strycova, Barbora |
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| Wozniacki, Caroline |
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| Garcia, Caroline | | Gasquet, Richard | | Mannarino, Adrian | | Mladenovic, Kristina | | Monfils, Gael | | Paire, Benoit | | Pouille, Lucas |
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| Basilashvili, Nikoloz |
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| Německo (5) |
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| Gojowczyk, Peter | | Kerber, Angelique | | Kohlschreiber, Philipp | | Siegemund, Laura | | Zverev, Alexander |
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| Sakkari, Maria | | Tsitsipas, Stefano |
| | | Itálie (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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| Muller, Gilles |
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| Begu, Irina-Camelia | | Buzarnescu, Mihaela | | Cirstea, Sorana | | Halep, Simona |
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| Kasatkina, Daria | | Khachanov, Karen | | Kuznetsova, Svetlana | | Medvedev, Daniil | | Pavlyuchenkova, Anastasia | | Sharapova, Maria | | Vesnina, Elena | | Vikhlyantseva, Natalia |
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| Anderson, Kevin |
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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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| Wawrinka, Stan |
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| Hsieh, Su-Wei |
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| Dolgopolov, Alexandr | | Svitolina, Elina | | Tsurenko, Lesia |
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| Edmund, Kyle | | Konta, Johanna |
| | USA (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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