| Argentina (7) |
|---|
| Bagnis, Facundo | | Berlocq, Carlos | | Del Potro, Juan Martin | | Kicker, Nicolas | | Olivo, Renzo | | Schwartzman, Diego | | Zeballos, Horacio |
| | Australien (6) |
|---|
| Kokkinakis, Thanasi | | Kyrgios, Nick | | Millman, John | | Thompson, Jordan | | Tomic, Bernard | | Whittington, Andrew |
| | Østrig (3) |
|---|
| Haider-Maurer, Andreas | | Ofner, Sebastian | | Thiem, Dominic |
| | Belgien (2) |
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| Bemelmans, Ruben | | Darcis, Steve |
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| Bosnien og Herzegovina (1) |
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| Dzumhur, Damir |
| | Brasilien (3) |
|---|
| Bellucci, Thomaz | | Dutra Silva, Rogerio | | Monteiro, Thiago |
| | Bulgarien (1) |
|---|
| Dimitrov, Grigor |
| | Canada (3) |
|---|
| Pospisil, Vasek | | Raonic, Milos | | Shapovalov, Denis |
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| Chile (2) |
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| Garin, Christian | | Jarry, Nicolas |
| | Kroatien (3) |
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| Cilic, Marin | | Coric, Borna | | Karlovic, Ivo |
| | Cypern (1) |
|---|
| Baghdatis, Marcos |
| | Tjekkiet (4) |
|---|
| Berdych, Tomas | | Pavlasek, Adam | | Rosol, Lukas | | Vesely, Jiri |
|
| Den Dominikanske Republik (1) |
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| Estrella Burgos, Victor |
| | Frankrig (11) |
|---|
| Benneteau, Julien | | Chardy, Jeremy | | Gasquet, Richard | | Herbert, Pierre-Hugues | | Mahut, Nicolas | | Mannarino, Adrian | | Monfils, Gael | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles | | Tsonga, Jo-Wilfried |
| | Georgien (1) |
|---|
| Basilashvili, Nikoloz |
| | Tyskland (9) |
|---|
| Brands, Daniel | | Brown, Dustin | | Gojowczyk, Peter | | Haas, Tommy | | Kohlschreiber, Philipp | | Mayer, Florian | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
|
| Grækenland (1) |
|---|
| Tsitsipas, Stefano |
| | Ungarn (1) |
|---|
| Fucsovics, Marton |
| | | Italien (7) |
|---|
| Bolelli, Simone | | Cecchinato, Marco | | Fabbiano, Thomas | | Fognini, Fabio | | Lorenzi, Paolo | | Seppi, Andreas | | Travaglia, Stefano |
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| Japan (3) |
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| Daniel, Taro | | Nishikori, Kei | | Sugita, Yuichi |
| | Kasakhstan (2) |
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| Bublik, Alexander | | Kukushkin, Mikhail |
| | Letland (1) |
|---|
| Gulbis, Ernests |
| | Litauen (1) |
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| Berankis, Ricardas |
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| Luxembourg (1) |
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| Muller, Gilles |
| | Mexico (1) |
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| Escobedo, Ernesto |
| | |
| | | Rumænien (1) |
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| Copil, Marius |
| | Rusland (7) |
|---|
| Donskoy, Evgeny | | Khachanov, Karen | | Kuznetsov, Andrey | | Medvedev, Daniil | | Rublev, Andrey | | Tursunov, Dmitry | | Youzhny, Mikhail |
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| Serbien (4) |
|---|
| Djokovic, Novak | | Lajovic, Dusan | | Tipsarevic, Janko | | Troicki, Viktor |
| | Slovakiet (2) |
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| Gombos, Norbert | | Klizan, Martin |
| | Slovenien (1) |
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| Bedene, Aljaz |
| | Sydafrika (1) |
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| Anderson, Kevin |
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| Spanien (7) |
|---|
| Bautista Agut, Roberto | | Ferrer, David | | Granollers, Marcel | | Lopez, Feliciano | | Nadal, Rafael | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
| | Schweizisk (3) |
|---|
| Federer, Roger | | Laaksonen, Henri | | Wawrinka, Stan |
| | | Tunesien (1) |
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| Jaziri, Malek |
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| Ukraine (3) |
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| Dolgopolov, Alexandr | | Marchenko, Illya | | Stakhovsky, Sergiy |
| | Storbritannien (6) |
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| Edmund, Kyle | | Klein, Brydan | | Murray, Andy | | Norrie, Cameron | | Ward, Alexander | | Ward, James |
| | USA (9) |
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| Donaldson, Jared | | Fritz, Taylor | | Harrison, Ryan | | Isner, John | | Johnson, Steve | | Querrey, Sam | | Sock, Jack | | Tiafoe, Frances | | Young, Donald |
| | Usbekistan (1) |
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| Istomin, Denis |
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