| Argentina (1) |
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| Schwartzman, Diego |
| | Australien (3) |
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| De Minaur, Alex | | Ebden, Matthew | | Millman, John |
| | | Bosnien og Herzegovina (1) |
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| Dzumhur, Damir |
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| Bulgarien (1) |
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| Dimitrov, Grigor |
| | Canada (2) |
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| Raonic, Milos | | Shapovalov, Denis |
| | Kroatien (2) |
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| Cilic, Marin | | Coric, Borna |
| | Frankrig (10) |
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| Chardy, Jeremy | | Gasquet, Richard | | Herbert, Pierre-Hugues | | Humbert, Ugo | | Mahut, Nicolas | | Mannarino, Adrian | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles | | Tsonga, Jo-Wilfried |
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| Georgien (1) |
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| Basilashvili, Nikoloz |
| | Tyskland (3) |
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| Gojowczyk, Peter | | Kohlschreiber, Philipp | | Zverev, Alexander |
| | Grækenland (1) |
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| Tsitsipas, Stefano |
| | Ungarn (1) |
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| Fucsovics, Marton |
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| Italien (2) |
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| Cecchinato, Marco | | Fognini, Fabio |
| | | Kasakhstan (1) |
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| Kukushkin, Mikhail |
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| | Rusland (2) |
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| Khachanov, Karen | | Medvedev, Daniil |
| | Serbien (2) |
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| Djokovic, Novak | | Krajinovic, Filip |
| | Sydafrika (1) |
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| Anderson, Kevin |
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| Spanien (5) |
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| Bautista Agut, Roberto | | Carreno Busta, Pablo | | Lopez, Feliciano | | Nadal, Rafael | | Verdasco, Fernando |
| | Schweizisk (1) |
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| Federer, Roger |
| | Tunesien (1) |
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| Jaziri, Malek |
| | Storbritannien (1) |
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| Edmund, Kyle |
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| USA (4) |
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| Isner, John | | Johnson, Steve | | Sock, Jack | | Tiafoe, Frances |
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