| Argentina (3) |
|---|
| Berlocq, Carlos | | Del Potro, Juan Martin | | Olivo, Renzo |
| | France (3) |
|---|
| Gasquet, Richard | | Mathieu, Paul-Henri | | Paire, Benoit |
| | Italy (1) |
|---|
| Caruso, Salvatore |
| | Japan (2) |
|---|
| Daniel, Taro | | Sugita, Yuichi |
|
| Luxembourg (1) |
|---|
| Muller, Gilles |
| | Portugal (5) |
|---|
| Domingues, Joao | | Elias, Gastao | | Silva, Frederico Ferreira | | Sousa, Joao | | Sousa, Pedro |
| | Russia (1) |
|---|
| Donskoy, Evgeny |
| | South Africa (1) |
|---|
| Anderson, Kevin |
|
| Spain (5) |
|---|
| Almagro, Nicolas | | Carreno Busta, Pablo | | Ferrer, David | | Garcia-Lopez, Guillermo | | Robredo, Tommy |
| | | | United Kingdom (1) |
|---|
| Edmund, Kyle |
|
| United States (2) |
|---|
| Fratangelo, Bjorn | | Harrison, Ryan |
| | Uzbekistan (1) |
|---|
| Istomin, Denis |
|