| Argentinië (4) |
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| Baez, Sebastian | | Cerundolo, Francisco | | Etcheverry, Tomas Martin | | Navone, Mariano |
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| De Minaur, Alex | | Ebden, Matthew | | Hijikata, Rinky | | Popyrin, Alexei |
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| Ofner, Sebastian |
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| Monteiro, Thiago | | Seyboth Wild, Thiago |
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| Auger-Aliassime, Felix | | Raonic, Milos |
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| Barrios Vera, Tomas | | Jarry, Nicolas | | Tabilo, Alejandro |
| |
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| Machac, Tomas | | Mensik, Jakub |
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| Fils, Arthur | | Humbert, Ugo | | Monfils, Gael | | Moutet, Corentin |
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| Koepfer, Dominik | | Marterer, Maximilian | | Struff, Jan-Lennard | | Zverev, Alexander |
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| Tsitsipas, Petros | | Tsitsipas, Stefanos |
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| Fucsovics, Marton | | Marozsan, Fabian |
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| Arnaldi, Matteo | | Darderi, Luciano | | Musetti, Lorenzo | | Vavassori, Andrea |
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| Daniel, Taro | | Nishikori, Kei |
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| Ruud, Casper |
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| Borges, Nuno | | Cabral, Francisco |
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| Kotov, Pavel | | Medvedev, Daniil | | Safiullin, Roman |
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| Alcaraz, Carlos | | Martinez, Pedro | | Munar, Jaume | | Nadal, Rafael |
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| Wawrinka, Stan |
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| Echargui, Moez |
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| Draper, Jack | | Evans, Daniel | | Norrie, Cameron |
| | Verenigde Staten (4) |
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| Eubanks, Christopher | | Fritz, Taylor | | Giron, Marcos | | Paul, Tommy |
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