| Argentína (5) |
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| Cachin, Pedro | | Cerundolo, Francisco | | Etcheverry, Tomas Martin | | Schwartzman, Diego | | Trungelliti, Marco |
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| De Minaur, Alex | | Kubler, Jason |
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| Ivashka, Ilya |
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| Goffin, David |
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| Taliansko (5) |
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| Arnaldi, Matteo | | Giustino, Lorenzo | | Musetti, Lorenzo | | Passaro, Francesco | | Sinner, Jannik |
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| Kovalik, Jozef |
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| Španielsko (11) |
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| Alcaraz, Carlos | | Andujar, Pablo | | Bautista Agut, Roberto | | Davidovich Fokina, Alejandro | | Lopez, Feliciano | | Martinez, Pedro | | Munar, Jaume | | Ramos-Vinolas, Albert | | Rincon, Daniel | | Verdasco, Fernando | | Zapata Miralles, Bernabe |
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| Krutykh, Oleksii |
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| Evans, Daniel | | Norrie, Cameron |
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| McDonald, Mackenzie | | Shelton, Ben | | Tiafoe, Frances |
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