| Argentina (9) |
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| Berlocq, Carlos | | Del Potro, Juan Martin | | Delbonis, Federico | | Kicker, Nicolas | | Olivo, Renzo | | Pella, Guido | | Schwartzman, Diego | | Trungelliti, Marco | | Zeballos, Horacio |
| | Austrália (6) |
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| De Minaur, Alex | | Kokkinakis, Thanasi | | Kyrgios, Nick | | Millman, John | | Thompson, Jordan | | Tomic, Bernard |
| | Áustria (1) |
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| Thiem, Dominic |
| | Bélgica (3) |
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| Darcis, Steve | | Goffin, David | | Greef, Arthur De |
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| Bósnia Herzegovina (1) |
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| Dzumhur, Damir |
| | Brasil (3) |
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| Bellucci, Thomaz | | Dutra Silva, Rogerio | | Monteiro, Thiago |
| | Bulgária (1) |
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| Dimitrov, Grigor |
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| | Colômbia (1) |
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| Giraldo, Santiago |
| | Croácia (3) |
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| Cilic, Marin | | Coric, Borna | | Karlovic, Ivo |
| | Chipre (1) |
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| Baghdatis, Marcos |
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| República Checa (2) |
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| Berdych, Tomas | | Vesely, Jiri |
| | República Dominicana (1) |
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| Estrella Burgos, Victor |
| | França (19) |
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| Benneteau, Julien | | Bonzi, Benjamin | | Bourgue, Mathias | | Chardy, Jeremy | | Gasquet, Richard | | Halys, Quentin | | Hamou, Maxime | | Herbert, Pierre-Hugues | | Lokoli, Laurent | | Mahut, Nicolas | | Mannarino, Adrian | | Mathieu, Paul-Henri | | Monfils, Gael | | Muller, Alexandre | | Paire, Benoit | | Pouille, Lucas | | Robert, Stephane | | Simon, Gilles | | Tsonga, Jo-Wilfried |
| | Geórgia (1) |
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| Basilashvili, Nikoloz |
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| Alemanha (6) |
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| Brown, Dustin | | Kohlschreiber, Philipp | | Mayer, Florian | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
| | Grécia (1) |
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| Tsitsipas, Stefano |
| | Itália (5) |
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| Bolelli, Simone | | Fognini, Fabio | | Lorenzi, Paolo | | Napolitano, Stefano | | Seppi, Andreas |
| | Japão (3) |
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| Daniel, Taro | | Nishikori, Kei | | Sugita, Yuichi |
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| Cazaquistão (1) |
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| Kukushkin, Mikhail |
| | Letónia (1) |
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| Gulbis, Ernests |
| | Lituânia (1) |
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| Berankis, Ricardas |
| | Luxemburgo (1) |
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| Muller, Gilles |
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| México (1) |
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| Escobedo, Ernesto |
| | | | Polónia (1) |
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| Janowicz, Jerzy |
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| Portugal (2) |
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| Elias, Gastao | | Sousa, Joao |
| | | Rússia (8) |
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| Donskoy, Evgeny | | Gabashvili, Teymuraz | | Khachanov, Karen | | Kravchuk, Konstantin | | Kuznetsov, Andrey | | Medvedev, Daniil | | Rublev, Andrey | | Youzhny, Mikhail |
| | Sérvia (4) |
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| Djokovic, Novak | | Lajovic, Dusan | | Tipsarevic, Janko | | Troicki, Viktor |
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| Eslováquia (2) |
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| Klizan, Martin | | Kovalik, Jozef |
| | Eslovénia (1) |
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| Bedene, Aljaz |
| | África do Sul (1) |
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| Anderson, Kevin |
| | Coreia do Sul (1) |
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| Chung, Hyeon |
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| Espanha (11) |
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| Almagro, Nicolas | | Bautista Agut, Roberto | | Carreno Busta, Pablo | | Ferrer, David | | Garcia-Lopez, Guillermo | | Granollers, Marcel | | Lopez, Feliciano | | Nadal, Rafael | | Ramos-Vinolas, Albert | | Robredo, Tommy | | Verdasco, Fernando |
| | | |
| Ucrânia (2) |
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| Dolgopolov, Alexandr | | Stakhovsky, Sergiy |
| | Reino Unido (3) |
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| Edmund, Kyle | | Evans, Daniel | | Murray, Andy |
| | Estados Unidos (10) |
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| Donaldson, Jared | | Fratangelo, Bjorn | | Harrison, Ryan | | Isner, John | | Johnson, Steve | | Querrey, Sam | | Sandgren, Tennys | | Sock, Jack | | Tiafoe, Frances | | Young, Donald |
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| Uzbequistão (1) |
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| Istomin, Denis |
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