| Argentinië (5) |
|---|
| Andreozzi, Guido | | Delbonis, Federico | | Londero, Juan Ignacio | | Pella, Guido | | Schwartzman, Diego |
| | Australië (2) |
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| Millman, John | | Popyrin, Alexei |
| | Oostenrijk (1) |
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| Thiem, Dominic |
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| Bosnië-Herzegovina (1) |
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| Dzumhur, Damir |
| | Bulgarije (1) |
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| Dimitrov, Grigor |
| | Canada (2) |
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| Auger-Aliassime, Felix | | Shapovalov, Denis |
| | Kroatië (2) |
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| Cilic, Marin | | Coric, Borna |
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| Frankrijk (6) |
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| Chardy, Jeremy | | Herbert, Pierre-Hugues | | Mannarino, Adrian | | Pouille, Lucas | | Simon, Gilles | | Tsonga, Jo-Wilfried |
| | Georgië (1) |
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| Basilashvili, Nikoloz |
| | Duitsland (3) |
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| Kohlschreiber, Philipp | | Struff, Jan-Lennard | | Zverev, Alexander |
| | Griekenland (1) |
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| Tsitsipas, Stefano |
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| Hongarije (1) |
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| Fucsovics, Marton |
| | Italië (5) |
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| Berrettini, Matteo | | Cecchinato, Marco | | Fognini, Fabio | | Seppi, Andreas | | Sonego, Lorenzo |
| | Japan (2) |
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| Daniel, Taro | | Nishikori, Kei |
| | Kazachstan (1) |
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| Kukushkin, Mikhail |
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| | Monaco (1) |
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| Catarina, Lucas |
| | |
| Rusland (3) |
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| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
| | Servië (3) |
|---|
| Djere, Laslo | | Djokovic, Novak | | Lajovic, Dusan |
| | Slowakije (1) |
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| Klizan, Martin |
| | Slovenië (1) |
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| Bedene, Aljaz |
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| Spanje (4) |
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| Bautista Agut, Roberto | | Munar, Jaume | | Nadal, Rafael | | Verdasco, Fernando |
| | Zwitserland (1) |
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| Wawrinka, Stan |
| | | Verenigd Koninkrijk (2) |
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| Edmund, Kyle | | Norrie, Cameron |
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| Verenigde Staten (1) |
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| Fritz, Taylor |
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