| Argentinië (7) |
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| Andreozzi, Guido | | Del Potro, Juan Martin | | Delbonis, Federico | | Mayer, Leonardo | | Pella, Guido | | Schwartzman, Diego | | Zeballos, Horacio |
| | Australië (10) |
|---|
| Bolt, Alex | | De Minaur, Alex | | Duckworth, James | | Ebden, Matthew | | Kubler, Jason | | Kyrgios, Nick | | Millman, John | | Smith, John-Patrick | | Thompson, Jordan | | Tomic, Bernard |
| | Oostenrijk (2) |
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| Novak, Dennis | | Thiem, Dominic |
| | België (2) |
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| Bemelmans, Ruben | | Goffin, David |
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| Bosnië-Herzegovina (2) |
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| Basic, Mirza | | Dzumhur, Damir |
| | Bulgarije (1) |
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| Dimitrov, Grigor |
| | Canada (4) |
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| Polansky, Peter | | Pospisil, Vasek | | Raonic, Milos | | Shapovalov, Denis |
| | Chili (2) |
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| Garin, Christian | | Jarry, Nicolas |
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| Kroatië (3) |
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| Cilic, Marin | | Coric, Borna | | Karlovic, Ivo |
| | Cyprus (1) |
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| Baghdatis, Marcos |
| | | Frankrijk (12) |
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| Barrere, Gregoire | | Benneteau, Julien | | Bonzi, Benjamin | | Chardy, Jeremy | | Gasquet, Richard | | Herbert, Pierre-Hugues | | Mannarino, Adrian | | Monfils, Gael | | Paire, Benoit | | Pouille, Lucas | | Robert, Stephane | | Simon, Gilles |
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| Georgië (1) |
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| Basilashvili, Nikoloz |
| | Duitsland (8) |
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| Gojowczyk, Peter | | Kohlschreiber, Philipp | | Maden, Yannick | | Marterer, Maximilian | | Mayer, Florian | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
| | Griekenland (1) |
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| Tsitsipas, Stefano |
| | Hongarije (1) |
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| Fucsovics, Marton |
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| | | Italië (9) |
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| Berrettini, Matteo | | Bolelli, Simone | | Cecchinato, Marco | | Fabbiano, Thomas | | Fognini, Fabio | | Lorenzi, Paolo | | Seppi, Andreas | | Sonego, Lorenzo | | Travaglia, Stefano |
| | Japan (4) |
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| Daniel, Taro | | Nishikori, Kei | | Nishioka, Yoshihito | | Sugita, Yuichi |
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| Kazachstan (1) |
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| Kukushkin, Mikhail |
| | Letland (1) |
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| Gulbis, Ernests |
| | Litouwen (1) |
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| Berankis, Ricardas |
| | Luxemburg (1) |
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| Muller, Gilles |
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| | Nederland (1) |
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| Haase, Robin |
| | | Portugal (2) |
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| Elias, Gastao | | Sousa, Joao |
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| Roemenië (1) |
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| Copil, Marius |
| | Rusland (4) |
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| Donskoy, Evgeny | | Khachanov, Karen | | Medvedev, Daniil | | Youzhny, Mikhail |
| | Servië (4) |
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| Djere, Laslo | | Djokovic, Novak | | Krajinovic, Filip | | Lajovic, Dusan |
| | Slowakije (2) |
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| Gombos, Norbert | | Lacko, Lukas |
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| Slovenië (1) |
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| Bedene, Aljaz |
| | Zuid-Afrika (1) |
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| Anderson, Kevin |
| | Spanje (8) |
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| Carballes Baena, Roberto | | Carreno Busta, Pablo | | Ferrer, David | | Garcia-Lopez, Guillermo | | Lopez, Feliciano | | Nadal, Rafael | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
| | Zwitserland (2) |
|---|
| Federer, Roger | | Wawrinka, Stan |
|
| | | Oekraïne (1) |
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| Stakhovsky, Sergiy |
| | Verenigd Koninkrijk (4) |
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| Broady, Liam | | Clarke, Jay | | Edmund, Kyle | | Norrie, Cameron |
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| Verenigde Staten (14) |
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| Donaldson, Jared | | Fritz, Taylor | | Harrison, Christian | | Harrison, Ryan | | Isner, John | | Johnson, Steve | | Klahn, Bradley | | Kudla, Denis | | McDonald, Mackenzie | | Mmoh, Michael | | Querrey, Sam | | Sandgren, Tennys | | Sock, Jack | | Tiafoe, Frances |
| | | Oezbekistan (1) |
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| Istomin, Denis |
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