| Argentinië (3) |
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| Baez, Sebastian | | Cerundolo, Francisco | | Schwartzman, Diego |
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| De Minaur, Alex | | Kyrgios, Nick |
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| Dimitrov, Grigor |
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| Canada (4) |
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| Auger-Aliassime, Felix | | Galarneau, Alexis | | Pospisil, Vasek | | Shapovalov, Denis |
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| Cilic, Marin | | Coric, Borna |
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| Rune, Holger |
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| Ruusuvuori, Emil |
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| Frankrijk (6) |
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| Bonzi, Benjamin | | Gaston, Hugo | | Mannarino, Adrian | | Monfils, Gael | | Paire, Benoit | | Rinderknech, Arthur |
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| Tsitsipas, Stefanos |
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| Nishioka, Yoshihito |
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| Bublik, Alexander |
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| Ruud, Casper |
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| Molcan, Alex |
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| Alcaraz, Carlos | | Bautista Agut, Roberto | | Carreno Busta, Pablo | | Davidovich Fokina, Alejandro | | Martinez, Pedro | | Ramos-Vinolas, Albert |
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| Zwitserland (1) |
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| Wawrinka, Stan |
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| Draper, Jack | | Evans, Daniel | | Murray, Andy | | Norrie, Cameron |
| | Verenigde Staten (8) |
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| Brooksby, Jenson | | Cressy, Maxime | | Fritz, Taylor | | Giron, Marcos | | McDonald, Mackenzie | | Nakashima, Brandon | | Paul, Tommy | | Tiafoe, Frances |
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