| Belgium (2) |
|---|
| Bemelmans, Ruben | | Goffin, David |
| | Bosnia and Herzegovina (1) |
|---|
| Dzumhur, Damir |
| | Bulgaria (1) |
|---|
| Dimitrov, Grigor |
| | Canada (1) |
|---|
| Auger-Aliassime, Felix |
|
| Czech Republic (1) |
|---|
| Berdych, Tomas |
| | France (5) |
|---|
| Gasquet, Richard | | Herbert, Pierre-Hugues | | Mahut, Nicolas | | Paire, Benoit | | Pouille, Lucas |
| | Germany (4) |
|---|
| Kohlschreiber, Philipp | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
| |
| | Luxembourg (1) |
|---|
| Muller, Gilles |
| | Netherlands (3) |
|---|
| Bakker, Thiemo de | | Griekspoor, Tallon | | Haase, Robin |
| |
| | Russia (3) |
|---|
| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
| | Serbia (2) |
|---|
| Krajinovic, Filip | | Troicki, Viktor |
| | Slovakia (1) |
|---|
| Klizan, Martin |
|
| Spain (2) |
|---|
| Ferrer, David | | Lopez, Feliciano |
| | Swiss (2) |
|---|
| Federer, Roger | | Wawrinka, Stan |
|