| Argentina (7) |
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| Del Potro, Juan Martin | | Delbonis, Federico | | Kicker, Nicolas | | Mayer, Leonardo | | Pella, Guido | | Schwartzman, Diego | | Zeballos, Horacio |
| | Austrálie (3) |
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| De Minaur, Alex | | Ebden, Matthew | | Kyrgios, Nick |
| | Rakousko (1) |
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| Thiem, Dominic |
| | Belgie (1) |
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| Bemelmans, Ruben |
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| Bosna a Hercegovina (1) |
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| Dzumhur, Damir |
| | Bulharsko (1) |
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| Dimitrov, Grigor |
| | Kanada (5) |
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| Auger-Aliassime, Felix | | Polansky, Peter | | Pospisil, Vasek | | Raonic, Milos | | Shapovalov, Denis |
| | Chorvatsko (3) |
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| Cilic, Marin | | Coric, Borna | | Karlovic, Ivo |
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| Kypr (1) |
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| Baghdatis, Marcos |
| | Česká republika (2) |
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| Berdych, Tomas | | Vesely, Jiri |
| | Dominikánská republika (1) |
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| Estrella Burgos, Victor |
| | Francie (9) |
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| Benneteau, Julien | | Chardy, Jeremy | | Herbert, Pierre-Hugues | | Mahut, Nicolas | | Mannarino, Adrian | | Monfils, Gael | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles |
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| Gruzie (1) |
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| Basilashvili, Nikoloz |
| | Německo (6) |
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| Gojowczyk, Peter | | Kohlschreiber, Philipp | | Marterer, Maximilian | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
| | Řecko (1) |
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| Tsitsipas, Stefano |
| | Maďarsko (1) |
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| Fucsovics, Marton |
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| | | Itálie (3) |
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| Berrettini, Matteo | | Fabbiano, Thomas | | Fognini, Fabio |
| | Japonsko (4) |
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| Daniel, Taro | | Nishikori, Kei | | Nishioka, Yoshihito | | Sugita, Yuichi |
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| Kazachstán (1) |
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| Kukushkin, Mikhail |
| | Litva (1) |
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| Berankis, Ricardas |
| | Lucembursko (1) |
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| Muller, Gilles |
| | Mexiko (1) |
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| Escobedo, Ernesto |
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| | Portugalsko (1) |
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| Sousa, Joao |
| | Rumunsko (1) |
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| Copil, Marius |
| | Rusko (5) |
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| Donskoy, Evgeny | | Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey | | Youzhny, Mikhail |
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| Srbsko (5) |
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| Djere, Laslo | | Djokovic, Novak | | Krajinovic, Filip | | Lajovic, Dusan | | Troicki, Viktor |
| | Slovensko (1) |
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| Lacko, Lukas |
| | Jihoafrická republika (1) |
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| Anderson, Kevin |
| | Jižní Korea (1) |
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| Chung, Hyeon |
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| Španělsko (6) |
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| Bautista Agut, Roberto | | Carreno Busta, Pablo | | Ferrer, David | | Lopez, Feliciano | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
| | Švýcarsko (1) |
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| Federer, Roger |
| | Velká Británie (2) |
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| Edmund, Kyle | | Norrie, Cameron |
| | USA (15) |
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| Donaldson, Jared | | Fritz, Taylor | | Harrison, Ryan | | Isner, John | | Johnson, Steve | | King, Evan | | Klahn, Bradley | | Krueger, Mitchell | | Opelka, Reilly | | Querrey, Sam | | Sandgren, Tennys | | Smyczek, Tim | | Sock, Jack | | Tiafoe, Frances | | Young, Donald |
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| | Uzbekistán (1) |
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| Istomin, Denis |
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