| Australien (1) |
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| Ebden, Matthew |
| | | Bosnien und Herzegowina (1) |
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| Dzumhur, Damir |
| | Kanada (2) |
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| Raonic, Milos | | Shapovalov, Denis |
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| Kroatien (1) |
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| Skugor, Franko |
| | Tschechien (1) |
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| Berdych, Tomas |
| | Frankreich (6) |
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| Chardy, Jeremy | | Herbert, Pierre-Hugues | | Monfils, Gael | | Paire, Benoit | | Simon, Gilles | | Tsonga, Jo-Wilfried |
| | Georgien (1) |
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| Basilashvili, Nikoloz |
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| Deutschland (2) |
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| Gojowczyk, Peter | | Kohlschreiber, Philipp |
| | Griechenland (1) |
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| Tsitsipas, Stefano |
| | Ungarn (1) |
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| Fucsovics, Marton |
| | Italien (2) |
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| Fabbiano, Thomas | | Seppi, Andreas |
|
| | Kasachstan (1) |
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| Kukushkin, Mikhail |
| | Lettland (1) |
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| Gulbis, Ernests |
| | Die Niederlande (2) |
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| Griekspoor, Tallon | | Haase, Robin |
|
| Rumänien (1) |
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| Copil, Marius |
| | Russland (2) |
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| Khachanov, Karen | | Medvedev, Daniil |
| | Slowakei (1) |
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| Klizan, Martin |
| |
| Spanien (1) |
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| Verdasco, Fernando |
| | Schweiz (1) |
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| Wawrinka, Stan |
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