| Argentina (2) |
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| Pella, Guido | | Schwartzman, Diego |
| | Australien (5) |
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| De Minaur, Alex | | Kyrgios, Nick | | Millman, John | | Thompson, Jordan | | Tomic, Bernard |
| | | Hviderusland (1) |
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| Ivashka, Ilya |
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| | Bulgarien (1) |
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| Dimitrov, Grigor |
| | Canada (6) |
|---|
| Auger-Aliassime, Felix | | Polansky, Peter | | Pospisil, Vasek | | Raonic, Milos | | Schnur, Brayden | | Shapovalov, Denis |
| | Chile (1) |
|---|
| Garin, Christian |
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| Kroatien (2) |
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| Cilic, Marin | | Coric, Borna |
| | Frankrig (8) |
|---|
| Gasquet, Richard | | Herbert, Pierre-Hugues | | Mannarino, Adrian | | Monfils, Gael | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles | | Tsonga, Jo-Wilfried |
| | Georgien (1) |
|---|
| Basilashvili, Nikoloz |
| | Tyskland (3) |
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| Gojowczyk, Peter | | Struff, Jan-Lennard | | Zverev, Alexander |
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| Grækenland (1) |
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| Tsitsipas, Stefano |
| | Ungarn (1) |
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| Fucsovics, Marton |
| | Italien (3) |
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| Berrettini, Matteo | | Cecchinato, Marco | | Fognini, Fabio |
| |
| Kasakhstan (1) |
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| Kukushkin, Mikhail |
| | | | Rusland (2) |
|---|
| Khachanov, Karen | | Medvedev, Daniil |
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| Serbien (2) |
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| Djere, Laslo | | Lajovic, Dusan |
| | Sydkorea (1) |
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| Kwon, Soonwoo |
| | Spanien (3) |
|---|
| Bautista Agut, Roberto | | Lopez, Feliciano | | Nadal, Rafael |
| | Schweizisk (1) |
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| Wawrinka, Stan |
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| Storbritannien (3) |
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| Edmund, Kyle | | Evans, Daniel | | Norrie, Cameron |
| | USA (4) |
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| Fritz, Taylor | | Isner, John | | Klahn, Bradley | | Paul, Tommy |
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