| Argentina (7) |
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| Berlocq, Carlos | | Del Potro, Juan Martin | | Kicker, Nicolas | | Mayer, Leonardo | | Pella, Guido | | Schwartzman, Diego | | Zeballos, Horacio |
| | Australia (7) |
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| De Minaur, Alex | | Kokkinakis, Thanasi | | Kyrgios, Nick | | Millman, John | | Smith, John-Patrick | | Thompson, Jordan | | Tomic, Bernard |
| | Austria (2) |
|---|
| Haider-Maurer, Andreas | | Thiem, Dominic |
| |
| Belgio (3) |
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| Bemelmans, Ruben | | Darcis, Steve | | Goffin, David |
| | Bosnia-Erzegovina (1) |
|---|
| Dzumhur, Damir |
| | Brasile (3) |
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| Bellucci, Thomaz | | Dutra Silva, Rogerio | | Monteiro, Thiago |
| | Bulgaria (1) |
|---|
| Dimitrov, Grigor |
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| Canada (2) |
|---|
| Pospisil, Vasek | | Shapovalov, Denis |
| | Colombia (1) |
|---|
| Giraldo, Santiago |
| | Croazia (3) |
|---|
| Cilic, Marin | | Coric, Borna | | Karlovic, Ivo |
| | Cipro (1) |
|---|
| Baghdatis, Marcos |
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| Repubblica Ceca (3) |
|---|
| Berdych, Tomas | | Safranek, Vaclav | | Vesely, Jiri |
| | Francia (13) |
|---|
| Benneteau, Julien | | Blancaneaux, Geoffrey | | Chardy, Jeremy | | Gasquet, Richard | | Herbert, Pierre-Hugues | | Mahut, Nicolas | | Mannarino, Adrian | | Millot, Vincent | | Monfils, Gael | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles | | Tsonga, Jo-Wilfried |
| | Georgia (1) |
|---|
| Basilashvili, Nikoloz |
| | Germania (8) |
|---|
| Brown, Dustin | | Kohlschreiber, Philipp | | Marterer, Maximilian | | Mayer, Florian | | Stebe, Cedrik-Marcel | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
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| Ungheria (1) |
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| Fucsovics, Marton |
| | | Italia (6) |
|---|
| Fabbiano, Thomas | | Fognini, Fabio | | Giannessi, Alessandro | | Lorenzi, Paolo | | Seppi, Andreas | | Travaglia, Stefano |
| | Giappone (2) |
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| Daniel, Taro | | 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 |
| | | | Portogallo (1) |
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| Sousa, Joao |
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| | Russia (7) |
|---|
| Donskoy, Evgeny | | Khachanov, Karen | | Kuznetsov, Andrey | | Medvedev, Daniil | | Rublev, Andrey | | Tursunov, Dmitry | | Youzhny, Mikhail |
| | Serbia (3) |
|---|
| Lajovic, Dusan | | Tipsarevic, Janko | | Troicki, Viktor |
| | Slovacchia (2) |
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| Gombos, Norbert | | Lacko, Lukas |
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| Slovenia (2) |
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| Bedene, Aljaz | | Kavcic, Blaz |
| | Sud Africa (1) |
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| Anderson, Kevin |
| | Corea del Sud (1) |
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| Chung, Hyeon |
| | Spagna (9) |
|---|
| Almagro, Nicolas | | Bautista Agut, Roberto | | Carreno Busta, Pablo | | Ferrer, David | | Lopez, Feliciano | | Menendez-Maceiras, Adrian | | Nadal, Rafael | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
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| Svizzera (2) |
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| Federer, Roger | | Laaksonen, Henri |
| | | | Ucraina (1) |
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| Dolgopolov, Alexandr |
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| Regno Unito (2) |
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| Edmund, Kyle | | Norrie, Cameron |
| | Stati Uniti (18) |
|---|
| Aragone, JC | | Donaldson, Jared | | Eubanks, Christopher | | Fratangelo, Bjorn | | Fritz, Taylor | | Harrison, Ryan | | Isner, John | | Johnson, Steve | | King, Evan | | Kwiatkowski, Thai-Son | | Kypson, Patrick | | Paul, Tommy | | Querrey, Sam | | Sandgren, Tennys | | Smyczek, Tim | | Sock, Jack | | Tiafoe, Frances | | Young, Donald |
| | | Usbechistan (1) |
|---|
| Istomin, Denis |
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