| Australia (1) |
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| Gavrilova, Daria |
| | Belgium (1) |
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| Mertens, Elise |
| | Bulgaria (1) |
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| Pironkova, Tsvetana |
| | Canada (1) |
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| Bouchard, Eugenie |
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| China (3) |
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| Duan, Ying-Ying | | Peng, Shuai | | Zhang, Shuai |
| | Croatia (2) |
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| Konjuh, Ana | | Lucic-Baroni, Mirjana |
| | Czech Republic (5) |
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| Kvitova, Petra | | Pliskova, Karolina | | Pliskova, Kristyna | | Siniakova, Katerina | | Strycova, Barbora |
| | Denmark (1) |
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| Wozniacki, Caroline |
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| France (2) |
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| Cornet, Alizé | | Mladenovic, Kristina |
| | Germany (3) |
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| Barthel, Mona | | Goerges, Julia | | Kerber, Angelique |
| | | Italy (1) |
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| Schiavone, Francesca |
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| Japan (2) |
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| Osaka, Naomi | | Ozaki, Risa |
| | Kazakhstan (1) |
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| Putintseva, Yulia |
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| Ostapenko, Jelena |
| | Paraguay (1) |
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| Cepede Royg, Veronica |
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| Poland (1) |
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| Radwanska, Agnieszka |
| | Romania (3) |
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| Cirstea, Sorana | | Halep, Simona | | Niculescu, Monica |
| | Russia (4) |
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| Kuznetsova, Svetlana | | Makarova, Ekaterina | | Pavlyuchenkova, Anastasia | | Vesnina, Elena |
| | Slovakia (2) |
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| Cibulkova, Dominika | | Kucova, Kristina |
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| Spain (3) |
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| Arruabarrena, Lara | | Muguruza, Garbiñe | | Suárez Navarro, Carla |
| | Swiss (1) |
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| Bacsinszky, Timea |
| | | Ukraine (1) |
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| Tsurenko, Lesia |
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| United Kingdom (3) |
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| Broady, Naomi | | Konta, Johanna | | Watson, Heather |
| | United States (5) |
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| Bellis, CiCi | | Davis, Lauren | | Lepchenko, Varvara | | McHale, Christina | | Riske, Alison |
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