| l’Argentine (5) |
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| Andreozzi, Guido | | Delbonis, Federico | | Mayer, Leonardo | | Pella, Guido | | Schwartzman, Diego |
| | l’Australie (7) |
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| Bolt, Alex | | De Minaur, Alex | | Ebden, Matthew | | Kyrgios, Nick | | Millman, John | | Popyrin, Alexei | | Thompson, Jordan |
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| Thiem, Dominic |
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| la Belgique (1) |
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| Goffin, David |
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| Dzumhur, Damir |
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| Dimitrov, Grigor |
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| Auger-Aliassime, Felix | | Raonic, Milos | | Shapovalov, Denis |
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| la Chile (1) |
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| Jarry, Nicolas |
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| Cilic, Marin | | Coric, Borna | | Karlovic, Ivo |
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| Berdych, Tomas |
| | la France (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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| la Géorgie (1) |
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| Basilashvili, Nikoloz |
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| Gojowczyk, Peter | | Kohlschreiber, Philipp | | Marterer, Maximilian | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
| | la Grèce (1) |
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| Tsitsipas, Stefano |
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| Fucsovics, Marton |
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| l’Inde (1) |
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| Gunneswaran, Prajnesh |
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| Berrettini, Matteo | | Cecchinato, Marco | | Fognini, Fabio | | Seppi, Andreas |
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| Haase, Robin |
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| la Servie (5) |
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| Anderson, Kevin |
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| | la Suisse (2) |
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| Federer, Roger | | Wawrinka, Stan |
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| | l’Oezbékistan (1) |
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| Istomin, Denis |
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