| Argentinië (3) |
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| Londero, Juan Ignacio | | Pella, Guido | | Schwartzman, Diego |
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| De Minaur, Alex | | Millman, John |
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| Thiem, Dominic |
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| Canada (3) |
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| Auger-Aliassime, Felix | | Pospisil, Vasek | | Shapovalov, Denis |
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| Garin, Christian |
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| Li, Zhe | | Zhang, Ze | | Zhang, Zhizhen |
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| Cilic, Marin | | Coric, Borna |
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| Frankrijk (6) |
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| Chardy, Jeremy | | Gasquet, Richard | | Monfils, Gael | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles |
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| Basilashvili, Nikoloz |
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| Tsitsipas, Stefano |
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| Berrettini, Matteo | | Cecchinato, Marco | | Fognini, Fabio | | Sonego, Lorenzo |
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| Bublik, Alexander | | Kukushkin, Mikhail |
| | |
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| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
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| Bautista Agut, Roberto | | Carreno Busta, Pablo | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
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| Zwitserland (1) |
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| Federer, Roger |
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| Edmund, Kyle | | Murray, Andy | | Norrie, Cameron |
| | Verenigde Staten (5) |
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| Fritz, Taylor | | Isner, John | | Opelka, Reilly | | Querrey, Sam | | Tiafoe, Frances |
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