| Argentina (3) |
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| Baez, Sebastian | | Cerundolo, Francisco | | Schwartzman, Diego |
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| De Minaur, Alex | | Kokkinakis, Thanasi | | Kyrgios, Nick |
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| Dimitrov, Grigor |
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| Evans, Daniel | | Murray, Andy | | Norrie, Cameron |
| | Stati Uniti (12) |
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| Brooksby, Jenson | | Cressy, Maxime | | Fritz, Taylor | | Giron, Marcos | | Isner, John | | Korda, Sebastian | | McDonald, Mackenzie | | Nakashima, Brandon | | Paul, Tommy | | Shelton, Ben | | Tiafoe, Frances | | Wolf, J.J. |
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