| Argentina (5) |
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| Andreozzi, Guido | | Delbonis, Federico | | Mayer, Leonardo | | Pella, Guido | | Schwartzman, Diego |
| | Australia (5) |
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| Ebden, Matthew | | Kyrgios, Nick | | Millman, John | | Thompson, Jordan | | Tomic, Bernard |
| | Austria (1) |
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| Thiem, Dominic |
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| Dzumhur, Damir |
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| Monteiro, Thiago |
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| Dimitrov, Grigor |
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| Canadá (3) |
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| Auger-Aliassime, Felix | | Raonic, Milos | | Shapovalov, Denis |
| | | Croacia (3) |
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| Berdych, Tomas |
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| Francia (8) |
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| Chardy, Jeremy | | Herbert, Pierre-Hugues | | Humbert, Ugo | | Mannarino, Adrian | | Monfils, Gael | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles |
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| Basilashvili, Nikoloz |
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| Tseng, Chun-Hsin |
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