| Argentina (3) |
|---|
| Londero, Juan Ignacio | | Pella, Guido | | Schwartzman, Diego |
| | Australia (2) |
|---|
| De Minaur, Alex | | Millman, John |
| | Austria (1) |
|---|
| Thiem, Dominic |
| |
| Canada (3) |
|---|
| Auger-Aliassime, Felix | | Pospisil, Vasek | | Shapovalov, Denis |
| | Chile (1) |
|---|
| Garin, Christian |
| | China (3) |
|---|
| Li, Zhe | | Zhang, Ze | | Zhang, Zhizhen |
| | Croatia (2) |
|---|
| Cilic, Marin | | Coric, Borna |
|
| France (6) |
|---|
| Chardy, Jeremy | | Gasquet, Richard | | Monfils, Gael | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles |
| | Georgia (1) |
|---|
| Basilashvili, Nikoloz |
| | Germany (2) |
|---|
| Struff, Jan-Lennard | | Zverev, Alexander |
| | Greece (1) |
|---|
| Tsitsipas, Stefano |
|
| Italy (4) |
|---|
| Berrettini, Matteo | | Cecchinato, Marco | | Fognini, Fabio | | Sonego, Lorenzo |
| | Kazakhstan (2) |
|---|
| Bublik, Alexander | | Kukushkin, Mikhail |
| | | Poland (1) |
|---|
| Hurkacz, Hubert |
|
| | Russia (3) |
|---|
| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
| | Serbia (4) |
|---|
| Djokovic, Novak | | Kecmanovic, Miomir | | Krajinovic, Filip | | Lajovic, Dusan |
| | Spain (4) |
|---|
| Bautista Agut, Roberto | | Carreno Busta, Pablo | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
|
| | United Kingdom (3) |
|---|
| Edmund, Kyle | | Murray, Andy | | Norrie, Cameron |
| | United States (5) |
|---|
| Fritz, Taylor | | Isner, John | | Opelka, Reilly | | Querrey, Sam | | Tiafoe, Frances |
| |