| Australia (3) |
|---|
| De Minaur, Alex | | Ebden, Matthew | | Thompson, Jordan |
| | Austria (1) |
|---|
| Rodionov, Jurij |
| | | Chile (2) |
|---|
| Garin, Christian | | Jarry, Nicolas |
|
| | France (5) |
|---|
| Chardy, Jeremy | | Gasquet, Richard | | Herbert, Pierre-Hugues | | Humbert, Ugo | | Mannarino, Adrian |
| | Greece (1) |
|---|
| Tsitsipas, Stefano |
| | Italy (5) |
|---|
| Caruso, Salvatore | | Fabbiano, Thomas | | Seppi, Andreas | | Sinner, Jannik | | Sonego, Lorenzo |
|
| Kazakhstan (1) |
|---|
| Kukushkin, Mikhail |
| | Netherlands (2) |
|---|
| Bakker, Thiemo de | | Haase, Robin |
| | | Slovenia (1) |
|---|
| Bedene, Aljaz |
|
| Spain (2) |
|---|
| Davidovich Fokina, Alejandro | | Verdasco, Fernando |
| | United States (3) |
|---|
| Fritz, Taylor | | Paul, Tommy | | Tiafoe, Frances |
|