| Australia (1) |
|---|
| Millman, John |
| | Austria (1) |
|---|
| Thiem, Dominic |
| | | Brasil (1) |
|---|
| Monteiro, Thiago |
|
| Chile (2) |
|---|
| Garin, Christian | | Tabilo, Alejandro |
| | Czech Republic (1) |
|---|
| Lehecka, Jiri |
| | | France (1) |
|---|
| Gasquet, Richard |
|
| | Italy (2) |
|---|
| Cecchinato, Marco | | Fognini, Fabio |
| | | Kazakhstan (1) |
|---|
| Kukushkin, Mikhail |
|
| | Russia (4) |
|---|
| Karatsev, Aslan | | Khachanov, Karen | | Rublev, Andrey | | Safiullin, Roman |
| | Serbia (6) |
|---|
| Djere, Laslo | | Djokovic, Novak | | Kecmanovic, Miomir | | Krajinovic, Filip | | Lajovic, Dusan | | Medjedovic, Hamad |
| | Slovenia (1) |
|---|
| Bedene, Aljaz |
|
| | Swiss (1) |
|---|
| Laaksonen, Henri |
|