| Argentina (1) |
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| Schwartzman, Diego |
| | Australien (1) |
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| Kyrgios, Nick |
| | Belgien (1) |
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| Mertens, Elise |
| | Bosnien og Herzegovina (1) |
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| Dzumhur, Damir |
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| Bulgarien (1) |
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| Dimitrov, Grigor |
| | Kroatien (2) |
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| Cilic, Marin | | Karlovic, Ivo |
| | Tjekkiet (1) |
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| Allertova, Denisa |
| | Danmark (1) |
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| Wozniacki, Caroline |
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| Estland (2) |
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| Kanepi, Kaia | | Kontaveit, Anett |
| | Frankrig (2) |
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| Cornet, Alizé | | Tsonga, Jo-Wilfried |
| | Georgien (1) |
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| Basilashvili, Nikoloz |
| | Italien (1) |
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| Seppi, Andreas |
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| Letland (1) |
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| Ostapenko, Jelena |
| | Luxembourg (1) |
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| Muller, Gilles |
| | |
| Rusland (1) |
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| Rublev, Andrey |
| | Slovakiet (1) |
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| Rybarikova, Magdalena |
| | Spanien (3) |
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| Carreno Busta, Pablo | | Nadal, Rafael | | Suárez Navarro, Carla |
| | Ukraine (4) |
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| Bondarenko, Kateryna | | Dolgopolov, Alexandr | | Kostyuk, Marta | | Svitolina, Elina |
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| Storbritannien (1) |
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| Edmund, Kyle |
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