| Argentina (5) |
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| Andreozzi, Guido | | Delbonis, Federico | | Mayer, Leonardo | | Pella, Guido | | Schwartzman, Diego |
| | Austrálie (5) |
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| Ebden, Matthew | | Kyrgios, Nick | | Millman, John | | Thompson, Jordan | | Tomic, Bernard |
| | Rakousko (1) |
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| Thiem, Dominic |
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| Ivashka, Ilya |
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| Dzumhur, Damir |
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| Dimitrov, Grigor |
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| Auger-Aliassime, Felix | | Raonic, Milos | | Shapovalov, Denis |
| | | Chorvatsko (3) |
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| Cilic, Marin | | Coric, Borna | | Karlovic, Ivo |
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| Berdych, Tomas |
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| Francie (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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| Gunneswaran, Prajnesh |
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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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| Rusko (3) |
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| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
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| Djokovic, Novak | | Kecmanovic, Miomir | | Krajinovic, Filip | | Lajovic, Dusan | | Tipsarevic, Janko |
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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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| Federer, Roger | | Wawrinka, Stan |
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| Tseng, Chun-Hsin |
| | | Velká Británie (3) |
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| Edmund, Kyle | | Evans, Daniel | | Norrie, Cameron |
| | USA (11) |
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| Eubanks, Christopher | | Fritz, Taylor | | Isner, John | | Johnson, Steve | | Klahn, Bradley | | Kudla, Denis | | McDonald, Mackenzie | | Opelka, Reilly | | Querrey, Sam | | Sandgren, Tennys | | Tiafoe, Frances |
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