| Argentina (1) |
|---|
| Pella, Guido |
| | Østerrike (1) |
|---|
| Thiem, Dominic |
| | | Bosnia og Herzegovina (1) |
|---|
| Dzumhur, Damir |
|
| | Tsjekkisk Republikk (1) |
|---|
| Berdych, Tomas |
| | Frankrike (2) |
|---|
| Herbert, Pierre-Hugues | | Mannarino, Adrian |
| | Georgia (1) |
|---|
| Basilashvili, Nikoloz |
|
| Tyskland (3) |
|---|
| Gojowczyk, Peter | | Kohlschreiber, Philipp | | Marterer, Maximilian |
| | Ungarn (1) |
|---|
| Fucsovics, Marton |
| | Italia (4) |
|---|
| Berrettini, Matteo | | Cecchinato, Marco | | Lorenzi, Paolo | | Seppi, Andreas |
| | Litauen (1) |
|---|
| Berankis, Ricardas |
|
| Nederland (1) |
|---|
| Haase, Robin |
| | Qatar (1) |
|---|
| Zayid, Mubarak Shannan |
| | | Russland (2) |
|---|
| Khachanov, Karen | | Rublev, Andrey |
|
| Serbia (2) |
|---|
| Djokovic, Novak | | Lajovic, Dusan |
| | Spania (4) |
|---|
| Bautista Agut, Roberto | | Garcia-Lopez, Guillermo | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
| | |
| Ukraina (1) |
|---|
| Stakhovsky, Sergiy |
|