| Argentina (3) |
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| Bagnis, Facundo | | Cerundolo, Juan Manuel | | Etcheverry, Tomas Martin |
| | Australia (4) |
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| Kubler, Jason | | Purcell, Max | | Thompson, Jordan | | Vukic, Aleksandar |
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| Chile (1) |
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| Garin, Christian |
| | | Colombia (1) |
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| Galan, Daniel Elahi |
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| Machac, Tomas |
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| | Alemania (2) |
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| Altmaier, Daniel | | Hanfmann, Yannick |
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| Watanuki, Yosuke |
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| Brouwer, Gijs |
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| España (1) |
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| Verdasco, Fernando |
| | Estados Unidos (10) |
|---|
| Giron, Marcos | | Isner, John | | Johnson, Steve | | Kovacevic, Aleksandar | | Kudla, Denis | | Nakashima, Brandon | | Paul, Tommy | | Sock, Jack | | Tiafoe, Frances | | Wolf, J.J. |
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