| Argentina (3) |
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| Baez, Sebastian | | Cerundolo, Francisco | | Schwartzman, Diego |
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| De Minaur, Alex | | Popyrin, Alexei |
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| Thiem, Dominic |
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| Dimitrov, Grigor |
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| Lehecka, Jiri |
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| Ruusuvuori, Emil |
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| Bonzi, Benjamin | | Gasquet, Richard | | Humbert, Ugo |
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| Bublik, Alexander |
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| Gakhov, Ivan | | Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
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| Bautista Agut, Roberto | | Davidovich Fokina, Alejandro | | Munar, Jaume | | Ramos-Vinolas, Albert | | Zapata Miralles, Bernabe |
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| Huesler, Marc-Andrea | | Wawrinka, Stan |
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| Draper, Jack | | Evans, Daniel | | Murray, Andy | | Norrie, Cameron |
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| Cressy, Maxime | | Fritz, Taylor | | McDonald, Mackenzie | | Shelton, Ben |
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