| Argentinië (3) |
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| Del Potro, Juan Martin | | Pella, Guido | | Schwartzman, Diego |
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| De Minaur, Alex | | Kyrgios, Nick | | Millman, John |
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| Thiem, Dominic |
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| Dimitrov, Grigor |
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| Auger-Aliassime, Felix | | Shapovalov, Denis |
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| Cilic, Marin | | Coric, Borna |
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| Frankrijk (7) |
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| Chardy, Jeremy | | Gasquet, Richard | | Herbert, Pierre-Hugues | | Mannarino, Adrian | | Monfils, Gael | | Pouille, Lucas | | Simon, Gilles |
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| Basilashvili, Nikoloz |
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| Kohlschreiber, Philipp | | Struff, Jan-Lennard | | Zverev, Alexander |
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| Tsitsipas, Stefano |
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| Fucsovics, Marton |
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| Cecchinato, Marco | | Fognini, Fabio | | Seppi, Andreas |
| | | Kazachstan (1) |
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| Kukushkin, Mikhail |
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| | | | Rusland (2) |
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| Khachanov, Karen | | Medvedev, Daniil |
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| Klizan, Martin |
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| Bautista Agut, Roberto | | Carreno Busta, Pablo | | Davidovich Fokina, Alejandro | | Ferrer, David | | Munar, Jaume | | Nadal, Rafael | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
| | Zwitserland (2) |
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| Federer, Roger | | Wawrinka, Stan |
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| Verenigd Koninkrijk (1) |
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| Edmund, Kyle |
| | Verenigde Staten (4) |
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| Fritz, Taylor | | Johnson, Steve | | Opelka, Reilly | | Tiafoe, Frances |
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