| Argentina (5) |
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| Andreozzi, Guido | | Delbonis, Federico | | Mayer, Leonardo | | Pella, Guido | | Schwartzman, Diego |
| | Australia (5) |
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| Ebden, Matthew | | Kyrgios, Nick | | Millman, John | | Thompson, Jordan | | Tomic, Bernard |
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| Thiem, Dominic |
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| Dzumhur, Damir |
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| Monteiro, Thiago |
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| Dimitrov, Grigor |
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| Canada (3) |
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| Auger-Aliassime, Felix | | Raonic, Milos | | Shapovalov, Denis |
| | | Kroatia (3) |
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| Cilic, Marin | | Coric, Borna | | Karlovic, Ivo |
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| Berdych, Tomas |
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| Frankrike (8) |
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| Chardy, Jeremy | | Herbert, Pierre-Hugues | | Humbert, Ugo | | Mannarino, Adrian | | Monfils, Gael | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles |
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| Basilashvili, Nikoloz |
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| Gojowczyk, Peter | | Kuhn, Nicola | | Marterer, Maximilian | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
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| Tsitsipas, Stefano |
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| Berrettini, Matteo | | Cecchinato, Marco | | Fabbiano, Thomas | | Fognini, Fabio | | Sonego, Lorenzo |
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| Daniel, Taro | | Nishikori, Kei |
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| Bublik, Alexander | | Kukushkin, Mikhail |
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| Gulbis, Ernests |
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| Haase, Robin |
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| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
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| Klizan, Martin | | Lacko, Lukas |
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| Bedene, Aljaz |
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| Anderson, Kevin | | Harris, Lloyd |
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| | | Sveits (2) |
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| Federer, Roger | | Wawrinka, Stan |
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| Tseng, Chun-Hsin |
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| Edmund, Kyle | | Evans, Daniel | | Norrie, Cameron |
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