| Argentinië (1) |
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| Tirante, Thiago Agustin |
| | Bulgarije (1) |
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| Dimitrov, Grigor |
| | | Frankrijk (3) |
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| Halys, Quentin | | Moutet, Corentin | | Muller, Alexandre |
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| | Italië (3) |
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| Berrettini, Matteo | | Darderi, Luciano | | Sonego, Lorenzo |
| | Nederland (1) |
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| Griekspoor, Tallon |
| | Noorwegen (1) |
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| Ruud, Casper |
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| Rusland (2) |
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| Kotov, Pavel | | Rublev, Andrey |
| | Servië (2) |
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| Djere, Laslo | | Kecmanovic, Miomir |
| | Spanje (2) |
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| Davidovich Fokina, Alejandro | | Martinez, Pedro |
| | Zweden (2) |
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| Borg, Leo | | Ymer, Elias |
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| Zwitserland (3) |
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| Huesler, Marc-Andrea | | Stricker, Dominic | | Wawrinka, Stan |
| | Verenigd Koninkrijk (2) |
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| Fearnley, Jacob | | Norrie, Cameron |
| | Verenigde Staten (3) |
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| Kovacevic, Aleksandar | | Nakashima, Brandon | | Paul, Tommy |
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