| Australia (5) |
|---|
| Bolt, Alex | | Ebden, Matthew | | Purcell, Max | | Smith, John-Patrick | | Tomic, Bernard |
| | Canada (1) |
|---|
| Pospisil, Vasek |
| | Croatia (2) |
|---|
| Karlovic, Ivo | | Skugor, Franko |
| | Cyprus (1) |
|---|
| Baghdatis, Marcos |
|
| France (4) |
|---|
| Chardy, Jeremy | | Gasquet, Richard | | Herbert, Pierre-Hugues | | Mannarino, Adrian |
| | Georgia (1) |
|---|
| Basilashvili, Nikoloz |
| | Greece (1) |
|---|
| Tsitsipas, Stefano |
| |
| | | Luxembourg (1) |
|---|
| Muller, Gilles |
| | Netherlands (2) |
|---|
| Griekspoor, Tallon | | Haase, Robin |
|
| | Russia (2) |
|---|
| Donskoy, Evgeny | | Medvedev, Daniil |
| | Slovenia (1) |
|---|
| Bedene, Aljaz |
| | Spain (2) |
|---|
| Garcia-Lopez, Guillermo | | Verdasco, Fernando |
|
| | United States (3) |
|---|
| King, Kevin | | McDonald, Mackenzie | | Smyczek, Tim |
|