| Argentina (4) |
|---|
| Baez, Sebastian | | Cerundolo, Francisco | | Coria, Federico | | Etcheverry, Tomas Martin |
| | Australia (2) |
|---|
| De Minaur, Alex | | Duckworth, James |
| | | France (10) |
|---|
| Barrere, Gregoire | | Gaston, Hugo | | Guinard, Manuel | | Humbert, Ugo | | Mannarino, Adrian | | Monfils, Gael | | Pouille, Lucas | | Rinderknech, Arthur | | Simon, Gilles | | Tsonga, Jo-Wilfried |
|
| Germany (2) |
|---|
| Altmaier, Daniel | | Otte, Oscar |
| | Japan (1) |
|---|
| Watanuki, Yosuke |
| | Russia (2) |
|---|
| Karatsev, Aslan | | Khachanov, Karen |
| |
| Slovenia (1) |
|---|
| Bedene, Aljaz |
| | South Korea (1) |
|---|
| Kwon, Soonwoo |
| | Spain (2) |
|---|
| Carreno Busta, Pablo | | Martinez, Pedro |
| | United Kingdom (1) |
|---|
| Norrie, Cameron |
|
| United States (1) |
|---|
| Mmoh, Michael |
|