| Argentina (2) |
|---|
| Cerundolo, Francisco | | Schwartzman, Diego |
| | Australia (1) |
|---|
| De Minaur, Alex |
| | Bulgaria (1) |
|---|
| Dimitrov, Grigor |
| | Canada (1) |
|---|
| Shapovalov, Denis |
|
| | Finland (1) |
|---|
| Ruusuvuori, Emil |
| | | Italy (3) |
|---|
| Berrettini, Matteo | | Musetti, Lorenzo | | Sonego, Lorenzo |
|
| Kazakhstan (1) |
|---|
| Bublik, Alexander |
| | Netherlands (1) |
|---|
| Zandschulp, Botic van de |
| | | Serbia (1) |
|---|
| Krajinovic, Filip |
|
| Spain (3) |
|---|
| Davidovich Fokina, Alejandro | | Martinez, Pedro | | Ramos-Vinolas, Albert |
| | | United Kingdom (7) |
|---|
| Broady, Liam | | Draper, Jack | | Evans, Daniel | | Jubb, Paul | | Murray, Andy | | Norrie, Cameron | | Peniston, Ryan |
| | United States (7) |
|---|
| Brooksby, Jenson | | Fritz, Taylor | | Kudla, Denis | | Opelka, Reilly | | Paul, Tommy | | Querrey, Sam | | Tiafoe, Frances |
|