| Аргентина (1) |
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| Cerundolo, Francisco |
| | | Болгария (1) |
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| Dimitrov, Grigor |
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| Bu, Yunchaokete | | Shang, Juncheng | | Zhang, Zhizhen | | Zhou, Yi |
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| Lehecka, Jiri | | Mensik, Jakub |
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| Mannarino, Adrian | | Monfils, Gael | | Mpetshi Perricard, Giovanni | | Rinderknech, Arthur |
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| Struff, Jan-Lennard |
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| Cobolli, Flavio | | Musetti, Lorenzo | | Sinner, Jannik | | Sonego, Lorenzo |
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| Bublik, Alexander |
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| Griekspoor, Tallon |
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| Khachanov, Karen | | Kotov, Pavel | | Medvedev, Daniil | | Rublev, Andrey | | Safiullin, Roman |
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| Kecmanovic, Miomir |
| | Испания (6) |
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| Alcaraz, Carlos | | Bautista Agut, Roberto | | Carballes Baena, Roberto | | Carreno Busta, Pablo | | Davidovich Fokina, Alejandro | | Martinez, Pedro |
| | Швейцария (1) |
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| Wawrinka, Stan |
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