| Argentinië (3) |
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| Baez, Sebastian | | Cerundolo, Francisco | | Etcheverry, Tomas Martin |
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| Duckworth, James |
| | | Canada (2) |
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| Auger-Aliassime, Felix | | Shapovalov, Denis |
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| Jarry, Nicolas | | Tabilo, Alejandro |
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| Lehecka, Jiri |
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| Rune, Holger |
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| Fils, Arthur | | Humbert, Ugo | | Mannarino, Adrian | | Mpetshi Perricard, Giovanni |
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| Altmaier, Daniel |
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| Tsitsipas, Stefanos |
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| Arnaldi, Matteo |
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| Ruud, Casper |
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| Bautista Agut, Roberto | | Martinez, Pedro |
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| Kym, Jerome | | Stricker, Dominic | | Wawrinka, Stan |
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| Shelton, Ben |
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