| Argentina (6) |
|---|
| Baez, Sebastian | | Cerundolo, Francisco | | Coria, Federico | | Delbonis, Federico | | Etcheverry, Tomas Martin | | Schwartzman, Diego |
| | Austria (1) |
|---|
| Thiem, Dominic |
| | Colombia (1) |
|---|
| Galan, Daniel Elahi |
| |
| Finland (1) |
|---|
| Ruusuvuori, Emil |
| | France (2) |
|---|
| Gaston, Hugo | | Rinderknech, Arthur |
| | Georgia (1) |
|---|
| Basilashvili, Nikoloz |
| | Germany (1) |
|---|
| Altmaier, Daniel |
|
| Italy (3) |
|---|
| Fognini, Fabio | | Musetti, Lorenzo | | Sonego, Lorenzo |
| | | Portugal (2) |
|---|
| Sousa, Joao | | Sousa, Pedro |
| | Russia (3) |
|---|
| Karatsev, Aslan | | Kotov, Pavel | | Rublev, Andrey |
|
| | Spain (5) |
|---|
| Bautista Agut, Roberto | | Carreno Busta, Pablo | | Davidovich Fokina, Alejandro | | Munar, Jaume | | Ramos-Vinolas, Albert |
| | | Switzerland (2) |
|---|
| Huesler, Marc-Andrea | | Wawrinka, Stan |
|