| Argentina (1) |
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| Schwartzman, Diego |
| | Australien (1) |
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| De Minaur, Alex |
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| Bosnien og Herzegovina (1) |
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| Dzumhur, Damir |
| | Bulgarien (1) |
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| Dimitrov, Grigor |
| | Canada (2) |
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| Raonic, Milos | | Shapovalov, Denis |
| | Chile (1) |
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| Garin, Christian |
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| Kroatien (2) |
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| Cilic, Marin | | Coric, Borna |
| | Frankrig (9) |
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| Chardy, Jeremy | | Gasquet, Richard | | Humbert, Ugo | | Mannarino, Adrian | | Monfils, Gael | | Moutet, Corentin | | Paire, Benoit | | Simon, Gilles | | Tsonga, Jo-Wilfried |
| | Georgien (1) |
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| Basilashvili, Nikoloz |
| | Tyskland (2) |
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| Struff, Jan-Lennard | | Zverev, Alexander |
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| Grækenland (1) |
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| Tsitsipas, Stefano |
| | Italien (3) |
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| Berrettini, Matteo | | Fognini, Fabio | | Seppi, Andreas |
| | Japan (1) |
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| Nishioka, Yoshihito |
| | Litauen (1) |
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| Berankis, Ricardas |
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| | | | Rusland (3) |
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| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
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| Serbien (3) |
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| Djere, Laslo | | Djokovic, Novak | | Lajovic, Dusan |
| | Spanien (3) |
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| Bautista Agut, Roberto | | Nadal, Rafael | | Verdasco, Fernando |
| | Schweizisk (2) |
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| Federer, Roger | | Wawrinka, Stan |
| | Storbritannien (2) |
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| Edmund, Kyle | | Norrie, Cameron |
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| USA (4) |
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| Fritz, Taylor | | Isner, John | | Querrey, Sam | | Tiafoe, Frances |
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