| Argentina (3) |
|---|
| Berlocq, Carlos | | Olivo, Renzo | | Zeballos, Horacio |
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| Tomic, Bernard |
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| Thiem, Dominic |
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| | | Colombia (1) |
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| Giraldo, Santiago |
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| Chardy, Jeremy | | Gasquet, Richard | | Herbert, Pierre-Hugues | | Paire, Benoit |
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| Basilashvili, Nikoloz |
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| Daniel, Taro | | Sugita, Yuichi |
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| Sousa, Joao |
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| Khachanov, Karen |
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| Anderson, Kevin |
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| Almagro, Nicolas | | Bautista Agut, Roberto | | Carreno Busta, Pablo | | Ferrer, David | | Garcia-Lopez, Guillermo | | Granollers, Marcel | | Lopez, Feliciano | | Montanes, Albert | | Nadal, Rafael | | Ramos-Vinolas, Albert | | Robredo, Tommy |
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| | Regno Unito (3) |
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| Edmund, Kyle | | Evans, Daniel | | Murray, Andy |
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| Istomin, Denis |
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