| Argentina (3) |
|---|
| Baez, Sebastian | | Bagnis, Facundo | | Delbonis, Federico |
| | Australien (4) |
|---|
| Kyrgios, Nick | | O'Connell, Christopher | | Popyrin, Alexei | | Thompson, Jordan |
| | |
| Finland (1) |
|---|
| Heliovaara, Harri |
| | Frankrig (2) |
|---|
| Gaston, Hugo | | Mannarino, Adrian |
| | Georgien (1) |
|---|
| Basilashvili, Nikoloz |
| | Tyskland (1) |
|---|
| Altmaier, Daniel |
|
| Italien (3) |
|---|
| Fognini, Fabio | | Sonego, Lorenzo | | Travaglia, Stefano |
| | Norge (1) |
|---|
| Durasovic, Viktor |
| | Rusland (1) |
|---|
| Karatsev, Aslan |
| | Serbien (2) |
|---|
| Kecmanovic, Miomir | | Lajovic, Dusan |
|
| Spanien (3) |
|---|
| Davidovich Fokina, Alejandro | | Martinez, Pedro | | Ramos-Vinolas, Albert |
| | Storbritannien (2) |
|---|
| Evans, Daniel | | Murray, Andy |
| | USA (5) |
|---|
| Cressy, Maxime | | Giron, Marcos | | Kudla, Denis | | Nakashima, Brandon | | Opelka, Reilly |
|