| Argentina (1) |
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| Londero, Juan Ignacio |
| | Belgien (2) |
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| Goffin, David | | Mertens, Elise |
| | Bulgarien (1) |
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| Dimitrov, Grigor |
| | Kroatien (1) |
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| Martic, Petra |
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| Tjekkiet (2) |
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| Pliskova, Karolina | | Vondrousova, Marketa |
| | | Frankrig (2) |
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| Moutet, Corentin | | Paire, Benoit |
| | Grækenland (1) |
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| Tsitsipas, Stefano |
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| | Letland (1) |
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| Sevastova, Anastasija |
| | | Rusland (1) |
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| Kudermetova, Veronika |
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| Serbien (2) |
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| Djere, Laslo | | Krajinovic, Filip |
| | Slovakiet (1) |
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| Kuzmova, Viktoria |
| | Slovenien (1) |
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| Hercog, Polona |
| | Spanien (4) |
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| Carreno Busta, Pablo | | Muguruza, Garbiñe | | Nadal, Rafael | | Suárez Navarro, Carla |
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| Federer, Roger | | Wawrinka, Stan |
| | Ukraine (1) |
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| Svitolina, Elina |
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| Konta, Johanna |
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