| Australia (4) |
|---|
| Kyrgios, Nick | | O'Connell, Christopher | | Popyrin, Alexei | | Thompson, Jordan |
| | | Finland (1) |
|---|
| Ruusuvuori, Emil |
| |
| Germany (1) |
|---|
| Gojowczyk, Peter |
| | Italy (2) |
|---|
| Seppi, Andreas | | Sinner, Jannik |
| | Japan (1) |
|---|
| Uchiyama, Yasutaka |
| | Lithuania (1) |
|---|
| Berankis, Ricardas |
|
| Russia (1) |
|---|
| Donskoy, Evgeny |
| | South Africa (2) |
|---|
| Anderson, Kevin | | Harris, Lloyd |
| | United Kingdom (1) |
|---|
| Norrie, Cameron |
| | United States (12) |
|---|
| Bryde, Trent | | Fratangelo, Bjorn | | Fritz, Taylor | | Isner, John | | Johnson, Steve | | Kudla, Denis | | McDonald, Mackenzie | | Nakashima, Brandon | | Opelka, Reilly | | Querrey, Sam | | Sock, Jack | | Wolf, J.J. |
|