| Argentina (1) |
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| Mayer, Leonardo |
| | Australia (2) |
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| Kyrgios, Nick | | Millman, John |
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| Dzumhur, Damir |
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| Berdych, Tomas |
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| Medvedev, Daniil |
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| Donaldson, Jared | | Harrison, Ryan | | Querrey, Sam | | Smyczek, Tim | | Sock, Jack | | Tiafoe, Frances |
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