| Argentinien (1) |
|---|
| Pella, Guido |
| | Österreich (2) |
|---|
| Haider-Maurer, Andreas | | Thiem, Dominic |
| | Bosnien und Herzegowina (1) |
|---|
| Basic, Mirza |
| |
| Tschechien (1) |
|---|
| Berdych, Tomas |
| | Dominikanische Republik (1) |
|---|
| Estrella Burgos, Victor |
| | Frankreich (2) |
|---|
| Gasquet, Richard | | Monfils, Gael |
| | Georgien (1) |
|---|
| Basilashvili, Nikoloz |
|
| Deutschland (4) |
|---|
| Gojowczyk, Peter | | Mayer, Florian | | Stebe, Cedrik-Marcel | | Struff, Jan-Lennard |
| | Griechenland (1) |
|---|
| Tsitsipas, Stefano |
| | | Italien (4) |
|---|
| Berrettini, Matteo | | Fabbiano, Thomas | | Lorenzi, Paolo | | Travaglia, Stefano |
|
| Katar (1) |
|---|
| Al-Mutawa, Jabor |
| | Russland (2) |
|---|
| Donskoy, Evgeny | | Rublev, Andrey |
| | Serbien (2) |
|---|
| Krajinovic, Filip | | Troicki, Viktor |
| | Slowenien (1) |
|---|
| Bedene, Aljaz |
|
| Spanien (5) |
|---|
| Carreno Busta, Pablo | | Garcia-Lopez, Guillermo | | Lopez, Feliciano | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
| | Tunesien (1) |
|---|
| Jaziri, Malek |
|