| Argentina (2) |
|---|
| Mayer, Leonardo | | Schwartzman, Diego |
| | Australia (1) |
|---|
| Millman, John |
| | Austria (1) |
|---|
| Thiem, Dominic |
| | Bosnia and Herzegovina (1) |
|---|
| Dzumhur, Damir |
|
| Brasil (1) |
|---|
| Monteiro, Thiago |
| | | France (5) |
|---|
| Gasquet, Richard | | Monfils, Gael | | Moutet, Corentin | | Paire, Benoit | | Simon, Gilles |
| | Georgia (1) |
|---|
| Basilashvili, Nikoloz |
|
| Germany (7) |
|---|
| Gojowczyk, Peter | | Kohlschreiber, Philipp | | Marterer, Maximilian | | Masur, Daniel | | Mayer, Florian | | Molleker, Rudolf | | Struff, Jan-Lennard |
| | Hungary (1) |
|---|
| Fucsovics, Marton |
| | Italy (1) |
|---|
| Cecchinato, Marco |
| |
| | Slovakia (1) |
|---|
| Kovalik, Jozef |
| | Slovenia (1) |
|---|
| Bedene, Aljaz |
| | Spain (4) |
|---|
| Carreno Busta, Pablo | | Ferrer, David | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
|
| Swiss (1) |
|---|
| Laaksonen, Henri |
| |