| Argentina (4) |
|---|
| Delbonis, Federico | | Londero, Juan Ignacio | | Pella, Guido | | Schwartzman, Diego |
| | Australia (3) |
|---|
| De Minaur, Alex | | Kyrgios, Nick | | Thompson, Jordan |
| | Austria (1) |
|---|
| Thiem, Dominic |
| |
| Bulgaria (1) |
|---|
| Dimitrov, Grigor |
| | Canada (2) |
|---|
| Auger-Aliassime, Felix | | Shapovalov, Denis |
| | | Croazia (3) |
|---|
| Cilic, Marin | | Coric, Borna | | Karlovic, Ivo |
|
| Francia (7) |
|---|
| Gasquet, Richard | | Herbert, Pierre-Hugues | | Mannarino, Adrian | | Monfils, Gael | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles |
| | Georgia (1) |
|---|
| Basilashvili, Nikoloz |
| | Germania (2) |
|---|
| Struff, Jan-Lennard | | Zverev, Alexander |
| | Grecia (1) |
|---|
| Tsitsipas, Stefano |
|
| Italia (4) |
|---|
| Berrettini, Matteo | | Cecchinato, Marco | | Fognini, Fabio | | Sonego, Lorenzo |
| | Giappone (2) |
|---|
| Nishikori, Kei | | Nishioka, Yoshihito |
| | Kazakistan (1) |
|---|
| Kukushkin, Mikhail |
| |
| | Polonia (1) |
|---|
| Hurkacz, Hubert |
| | Portogallo (1) |
|---|
| Sousa, Joao |
| | Russia (3) |
|---|
| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
|
| Serbia (4) |
|---|
| Djere, Laslo | | Djokovic, Novak | | Kecmanovic, Miomir | | Lajovic, Dusan |
| | Spagna (3) |
|---|
| Bautista Agut, Roberto | | Carreno Busta, Pablo | | Verdasco, Fernando |
| | Svizzera (2) |
|---|
| Federer, Roger | | Wawrinka, Stan |
| | Regno Unito (2) |
|---|
| Edmund, Kyle | | Murray, Andy |
|
| Stati Uniti (6) |
|---|
| Fritz, Taylor | | Isner, John | | Kudla, Denis | | Opelka, Reilly | | Querrey, Sam | | Tiafoe, Frances |
|