| Argentina (5) |
|---|
| Andreozzi, Guido | | Bagnis, Facundo | | Berlocq, Carlos | | Delbonis, Federico | | Londero, Juan Ignacio |
| | Czech Republic (1) |
|---|
| Vesely, Jiri |
| | France (5) |
|---|
| Herbert, Pierre-Hugues | | Humbert, Ugo | | Paire, Benoit | | Simon, Gilles | | Tsonga, Jo-Wilfried |
| | Germany (4) |
|---|
| Kohlschreiber, Philipp | | Stebe, Cedrik-Marcel | | Zverev, Alexander | | Zverev, Mischa |
|
| Italy (3) |
|---|
| Fabbiano, Thomas | | Fognini, Fabio | | Sonego, Lorenzo |
| | | Netherlands (1) |
|---|
| Haase, Robin |
| |
| Slovakia (1) |
|---|
| Kovalik, Jozef |
| | Slovenia (1) |
|---|
| Bedene, Aljaz |
| | Spain (6) |
|---|
| Andujar, Pablo | | Davidovich Fokina, Alejandro | | Menendez-Maceiras, Adrian | | Munar, Jaume | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
| |
| United Kingdom (1) |
|---|
| Edmund, Kyle |
| | Uzbekistan (1) |
|---|
| Istomin, Denis |
|