| 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 |
| | Australia (6) |
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| De Minaur, Alex | | Kokkinakis, Thanasi | | Kyrgios, Nick | | Millman, John | | Thompson, Jordan | | Tomic, Bernard |
| | Austria (1) |
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| Thiem, Dominic |
| | Belgio (3) |
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| Darcis, Steve | | Goffin, David | | Greef, Arthur De |
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| Bosnia-Erzegovina (1) |
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| Dzumhur, Damir |
| | Brasile (3) |
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| Bellucci, Thomaz | | Dutra Silva, Rogerio | | Monteiro, Thiago |
| | Bulgaria (1) |
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| Dimitrov, Grigor |
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| | Colombia (1) |
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| Giraldo, Santiago |
| | Croazia (3) |
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| Cilic, Marin | | Coric, Borna | | Karlovic, Ivo |
| | Cipro (1) |
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| Baghdatis, Marcos |
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| Repubblica Ceca (2) |
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| Berdych, Tomas | | Vesely, Jiri |
| | Repubblica Dominicana (1) |
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| Estrella Burgos, Victor |
| | Francia (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 |
| | Georgia (1) |
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| Basilashvili, Nikoloz |
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| Germania (6) |
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| Brown, Dustin | | Kohlschreiber, Philipp | | Mayer, Florian | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
| | Grecia (1) |
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| Tsitsipas, Stefano |
| | Italia (5) |
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| Bolelli, Simone | | Fognini, Fabio | | Lorenzi, Paolo | | Napolitano, Stefano | | Seppi, Andreas |
| | Giappone (3) |
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| Daniel, Taro | | Nishikori, Kei | | Sugita, Yuichi |
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| Kazakistan (1) |
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| Kukushkin, Mikhail |
| | Lettonia (1) |
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| Gulbis, Ernests |
| | Lituania (1) |
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| Berankis, Ricardas |
| | Lussemburgo (1) |
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| Muller, Gilles |
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| Messico (1) |
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| Escobedo, Ernesto |
| | | | Polonia (1) |
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| Janowicz, Jerzy |
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| Portogallo (2) |
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| Elias, Gastao | | Sousa, Joao |
| | | Russia (8) |
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| Donskoy, Evgeny | | Gabashvili, Teymuraz | | Khachanov, Karen | | Kravchuk, Konstantin | | Kuznetsov, Andrey | | Medvedev, Daniil | | Rublev, Andrey | | Youzhny, Mikhail |
| | Serbia (4) |
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| Djokovic, Novak | | Lajovic, Dusan | | Tipsarevic, Janko | | Troicki, Viktor |
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| Slovacchia (2) |
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| Klizan, Martin | | Kovalik, Jozef |
| | Slovenia (1) |
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| Bedene, Aljaz |
| | Sud Africa (1) |
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| Anderson, Kevin |
| | Corea del Sud (1) |
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| Chung, Hyeon |
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| Spagna (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 |
| | Svizzera (1) |
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| Wawrinka, Stan |
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| Ucraina (2) |
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| Dolgopolov, Alexandr | | Stakhovsky, Sergiy |
| | Regno Unito (3) |
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| Edmund, Kyle | | Evans, Daniel | | Murray, Andy |
| | Stati Uniti (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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| Usbechistan (1) |
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| Istomin, Denis |
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