| Argentina (3) |
|---|
| Del Potro, Juan Martin | | Mayer, Leonardo | | Schwartzman, Diego |
| | Australia (5) |
|---|
| Barty, Ashleigh | | Gavrilova, Daria | | Kasatkina, Daria | | Kyrgios, Nick | | Tomljanovic, Ajla |
| | Austria (1) |
|---|
| Thiem, Dominic |
| | Belarus (3) |
|---|
| Azarenka, Victoria | | Sabalenka, Aryna | | Sasnovich, Aliaksandra |
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| Belgium (2) |
|---|
| Goffin, David | | Mertens, Elise |
| | Bosnia and Herzegovina (1) |
|---|
| Dzumhur, Damir |
| | Bulgaria (1) |
|---|
| Dimitrov, Grigor |
| | Canada (2) |
|---|
| Raonic, Milos | | Shapovalov, Denis |
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| Croatia (3) |
|---|
| Cilic, Marin | | Coric, Borna | | Martic, Petra |
| | Czech Republic (5) |
|---|
| Kvitova, Petra | | Pliskova, Karolina | | Siniakova, Katerina | | Strycova, Barbora | | Vondrousova, Marketa |
| | Denmark (1) |
|---|
| Wozniacki, Caroline |
| | Estonia (2) |
|---|
| Kanepi, Kaia | | Kontaveit, Anett |
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| France (8) |
|---|
| Chardy, Jeremy | | Cornet, Alizé | | Garcia, Caroline | | Gasquet, Richard | | Mannarino, Adrian | | Mladenovic, Kristina | | Paire, Benoit | | Pouille, Lucas |
| | Germany (8) |
|---|
| Goerges, Julia | | Gojowczyk, Peter | | Kerber, Angelique | | Kohlschreiber, Philipp | | Maria, Tatjana | | Marterer, Maximilian | | Zverev, Alexander | | Zverev, Mischa |
| | Greece (2) |
|---|
| Sakkari, Maria | | Tsitsipas, Stefano |
| | Hungary (2) |
|---|
| Babos, Timea | | Fucsovics, Marton |
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| Italy (2) |
|---|
| Cecchinato, Marco | | Giorgi, Camila |
| | Japan (2) |
|---|
| Nishikori, Kei | | Osaka, Naomi |
| | Latvia (2) |
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| Ostapenko, Jelena | | Sevastova, Anastasija |
| | Netherlands (2) |
|---|
| Bertens, Kiki | | Haase, Robin |
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| Poland (2) |
|---|
| Hurkacz, Hubert | | Radwanska, Agnieszka |
| | | Romania (4) |
|---|
| Begu, Irina-Camelia | | Bogdan, Ana | | Copil, Marius | | Halep, Simona |
| | Russia (6) |
|---|
| Khachanov, Karen | | Kuznetsova, Svetlana | | Makarova, Ekaterina | | Medvedev, Daniil | | Pavlyuchenkova, Anastasia | | Rublev, Andrey |
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| Serbia (4) |
|---|
| Djokovic, Novak | | Krajinovic, Filip | | Krunic, Aleksandra | | Lajovic, Dusan |
| | Slovakia (2) |
|---|
| Kuzmova, Viktoria | | Rybarikova, Magdalena |
| | South Africa (1) |
|---|
| Anderson, Kevin |
| | South Korea (1) |
|---|
| Chung, Hyeon |
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| Spain (7) |
|---|
| Carreno Busta, Pablo | | Ferrer, David | | Garcia-Lopez, Guillermo | | Muguruza, Garbiñe | | Ramos-Vinolas, Albert | | Suárez Navarro, Carla | | Verdasco, Fernando |
| | Sweden (1) |
|---|
| Peterson, Rebecca |
| | Swiss (3) |
|---|
| Federer, Roger | | Voegele, Stefanie | | Wawrinka, Stan |
| |
| Ukraine (2) |
|---|
| Svitolina, Elina | | Tsurenko, Lesia |
| | United Kingdom (3) |
|---|
| Edmund, Kyle | | Konta, Johanna | | Murray, Andy |
| | United States (18) |
|---|
| 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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