| Argentina (2) |
|---|
| Del Potro, Juan Martin | | Schwartzman, Diego |
| | Australia (2) |
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| De Minaur, Alex | | Kyrgios, Nick |
| | Bulgaria (1) |
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| Dimitrov, Grigor |
| | Canada (3) |
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| Auger-Aliassime, Felix | | Raonic, Milos | | Shapovalov, Denis |
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| | | Francia (5) |
|---|
| Chardy, Jeremy | | Mahut, Nicolas | | Mannarino, Adrian | | Pouille, Lucas | | Simon, Gilles |
| | Grecia (1) |
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| Tsitsipas, Stefano |
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| Ungheria (1) |
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| Fucsovics, Marton |
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| Cecchinato, Marco |
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| Bublik, Alexander | | Kukushkin, Mikhail |
| | Russia (1) |
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| Medvedev, Daniil |
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| Slovenia (1) |
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| Bedene, Aljaz |
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| Anderson, Kevin |
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| Carballes Baena, Roberto | | Lopez, Feliciano | | Verdasco, Fernando |
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| Wawrinka, Stan |
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| Regno Unito (5) |
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| Clarke, Jay | | Edmund, Kyle | | Evans, Daniel | | Norrie, Cameron | | Ward, James |
| | Stati Uniti (1) |
|---|
| Tiafoe, Frances |
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