| Argentina (3) |
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| Del Potro, Juan Martin | | Mayer, Leonardo | | Schwartzman, Diego |
| | Australia (4) |
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| Barty, Ashleigh | | Gavrilova, Daria | | Kyrgios, Nick | | Tomljanovic, Ajla |
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| Thiem, Dominic |
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| Azarenka, Victoria | | Sabalenka, Aryna | | Sasnovich, Aliaksandra |
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| Bélgica (2) |
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| Goffin, David | | Mertens, Elise |
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| Dzumhur, Damir |
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| Dimitrov, Grigor |
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| Raonic, Milos | | Shapovalov, Denis |
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| Croacia (3) |
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| Cilic, Marin | | Coric, Borna | | Martic, Petra |
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| Kvitova, Petra | | Pliskova, Karolina | | Siniakova, Katerina | | Strycova, Barbora | | Vondrousova, Marketa |
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| Wozniacki, Caroline |
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| Francia (8) |
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| Chardy, Jeremy | | Cornet, Alizé | | Garcia, Caroline | | Gasquet, Richard | | Mannarino, Adrian | | Mladenovic, Kristina | | Paire, Benoit | | Pouille, Lucas |
| | Alemania (8) |
|---|
| Goerges, Julia | | Gojowczyk, Peter | | Kerber, Angelique | | Kohlschreiber, Philipp | | Maria, Tatjana | | Marterer, Maximilian | | Zverev, Alexander | | Zverev, Mischa |
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| Babos, Timea | | Fucsovics, Marton |
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| Kasatkina, Daria | | Khachanov, Karen | | Kuznetsova, Svetlana | | Makarova, Ekaterina | | Medvedev, Daniil | | Pavlyuchenkova, Anastasia | | Rublev, Andrey |
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| Serbia (4) |
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| Djokovic, Novak | | Krajinovic, Filip | | Krunic, Aleksandra | | Lajovic, Dusan |
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| | Suecia (1) |
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| Peterson, Rebecca |
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| Federer, Roger | | Voegele, Stefanie | | Wawrinka, Stan |
| |
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| Edmund, Kyle | | Konta, Johanna | | Murray, Andy |
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