| Argentina (2) |
|---|
| Del Potro, Juan Martin | | Schwartzman, Diego |
| | Australia (2) |
|---|
| De Minaur, Alex | | Kyrgios, Nick |
| | Bulgaria (1) |
|---|
| Dimitrov, Grigor |
| | Canada (3) |
|---|
| Auger-Aliassime, Felix | | Raonic, Milos | | Shapovalov, Denis |
|
| Chile (1) |
|---|
| Garin, Christian |
| | | France (5) |
|---|
| Chardy, Jeremy | | Mahut, Nicolas | | Mannarino, Adrian | | Pouille, Lucas | | Simon, Gilles |
| | Greece (1) |
|---|
| Tsitsipas, Stefano |
|
| Hungary (1) |
|---|
| Fucsovics, Marton |
| | Italy (1) |
|---|
| Cecchinato, Marco |
| | Kazakhstan (2) |
|---|
| Bublik, Alexander | | Kukushkin, Mikhail |
| | Russia (1) |
|---|
| Medvedev, Daniil |
|
| Slovenia (1) |
|---|
| Bedene, Aljaz |
| | South Africa (1) |
|---|
| Anderson, Kevin |
| | Spain (3) |
|---|
| Carballes Baena, Roberto | | Lopez, Feliciano | | Verdasco, Fernando |
| |
| United Kingdom (5) |
|---|
| Clarke, Jay | | Edmund, Kyle | | Evans, Daniel | | Norrie, Cameron | | Ward, James |
| | United States (1) |
|---|
| Tiafoe, Frances |
|