| Argentina (1) |
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| Mayer, Leonardo |
| | Australia (2) |
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| Kyrgios, Nick | | Millman, John |
| | | Bosnia y Herzegovina (1) |
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| Dzumhur, Damir |
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| Dimitrov, Grigor |
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| Berdych, Tomas |
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| Benneteau, Julien | | Chardy, Jeremy | | Mannarino, Adrian |
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| Muller, Gilles |
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| Medvedev, Daniil |
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| Anderson, Kevin |
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| Reino Unido (5) |
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| Clarke, Jay | | Edmund, Kyle | | Evans, Daniel | | Murray, Andy | | Norrie, Cameron |
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| Donaldson, Jared | | Harrison, Ryan | | Querrey, Sam | | Smyczek, Tim | | Sock, Jack | | Tiafoe, Frances |
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