| Australia (2) |
|---|
| Thompson, Jordan | | Tomic, Bernard |
| | | Chile (1) |
|---|
| Garin, Christian |
| | Colombia (2) |
|---|
| Galan, Daniel Elahi | | Giraldo, Santiago |
|
| | | |
| Serbia (2) |
|---|
| Krstin, Pedja | | Tipsarevic, Janko |
| | Spain (2) |
|---|
| Garcia-Lopez, Guillermo | | Granollers, Marcel |
| | Switzerland (1) |
|---|
| Laaksonen, Henri |
| | United Kingdom (1) |
|---|
| Norrie, Cameron |
|
| United States (11) |
|---|
| Fratangelo, Bjorn | | Fritz, Taylor | | Harrison, Ryan | | Johnson, Steve | | Klahn, Bradley | | Kudla, Denis | | McDonald, Mackenzie | | Opelka, Reilly | | Querrey, Sam | | Rubin, Noah | | Sandgren, Tennys |
| |