| Argentina (3) |
|---|
| Delbonis, Federico | | Londero, Juan Ignacio | | Mayer, Leonardo |
| | Austria (1) |
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| Thiem, Dominic |
| | | Brasil (1) |
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| Monteiro, Thiago |
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| Chile (2) |
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| Garin, Christian | | Jarry, Nicolas |
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| Chardy, Jeremy | | Gasquet, Richard | | Paire, Benoit |
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| Basilashvili, Nikoloz |
| | Alemania (7) |
|---|
| Altmaier, Daniel | | Hanfmann, Yannick | | Kohlschreiber, Philipp | | Lenz, Julian | | Molleker, Rudolf | | Struff, Jan-Lennard | | Zverev, Alexander |
|
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| Fucsovics, Marton |
| | | Italia (3) |
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| Caruso, Salvatore | | Cecchinato, Marco | | Fognini, Fabio |
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| Haase, Robin |
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| Djere, Laslo | | Krajinovic, Filip |
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| Klizan, Martin |
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| Carreno Busta, Pablo | | Davidovich Fokina, Alejandro |
| |