| Argentinië (1) |
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| Delbonis, Federico |
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| Duckworth, James | | Millman, John |
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| Shapovalov, Denis |
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| Cilic, Marin | | Serdarusic, Nino |
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| Ruusuvuori, Emil |
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| Struff, Jan-Lennard |
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| Zandschulp, Botic van de |
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| Andujar, Pablo | | Bautista Agut, Roberto | | Martinez, Pedro | | Ramos-Vinolas, Albert |
| | Verenigde Staten (4) |
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| Fritz, Taylor | | Korda, Sebastian | | McDonald, Mackenzie | | Paul, Tommy |
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