| Australia (4) |
|---|
| Bolt, Alex | | De Minaur, Alex | | Kyrgios, Nick | | Millman, John |
| | Bosnia and Herzegovina (1) |
|---|
| Dzumhur, Damir |
| | Bulgaria (1) |
|---|
| Dimitrov, Grigor |
| | Canada (1) |
|---|
| Auger-Aliassime, Felix |
|
| France (2) |
|---|
| Humbert, Ugo | | Mannarino, Adrian |
| | Germany (2) |
|---|
| Zverev, Alexander | | Zverev, Mischa |
| | | Mexico (1) |
|---|
| Lopez Villasenor, Gerardo |
|
| | Serbia (2) |
|---|
| Kecmanovic, Miomir | | Lajovic, Dusan |
| | South Korea (1) |
|---|
| Kwon, Soonwoo |
| | Spain (4) |
|---|
| Andujar, Pablo | | Lopez, Feliciano | | Martinez, Pedro | | Nadal, Rafael |
|
| | | United Kingdom (2) |
|---|
| Edmund, Kyle | | Norrie, Cameron |
| | United States (8) |
|---|
| Fritz, Taylor | | Giron, Marcos | | Isner, John | | Johnson, Steve | | McDonald, Mackenzie | | Opelka, Reilly | | Paul, Tommy | | Tiafoe, Frances |
|