| Australia (4) |
|---|
| De Minaur, Alex | | Ebden, Matthew | | Millman, John | | Popyrin, Alexei |
| | Canada (2) |
|---|
| Polansky, Peter | | Shapovalov, Denis |
| | |
| Germany (3) |
|---|
| Kohlschreiber, Philipp | | Marterer, Maximilian | | Otte, Oscar |
| | Greece (1) |
|---|
| Tsitsipas, Stefano |
| | |
| Latvia (1) |
|---|
| Gulbis, Ernests |
| | | | South Korea (1) |
|---|
| Chung, Hyeon |
|
| Spain (2) |
|---|
| Garcia-Lopez, Guillermo | | Verdasco, Fernando |
| | Sweden (2) |
|---|
| Ymer, Elias | | Ymer, Mikael |
| | United States (6) |
|---|
| Fritz, Taylor | | Isner, John | | Klahn, Bradley | | Kudla, Denis | | Sandgren, Tennys | | Sock, Jack |
|