| Argentina (3) |
|---|
| Cerundolo, Francisco | | Etcheverry, Tomas Martin | | Navone, Mariano |
| | Australia (3) |
|---|
| De Minaur, Alex | | Duckworth, James | | O'Connell, Christopher |
| | Canada (1) |
|---|
| Shapovalov, Denis |
| |
| Croatia (2) |
|---|
| Ajdukovic, Duje | | Cilic, Marin |
| | Czech Republic (1) |
|---|
| Lehecka, Jiri |
| | France (1) |
|---|
| Muller, Alexandre |
| | Germany (1) |
|---|
| Altmaier, Daniel |
|
| Hungary (2) |
|---|
| Fucsovics, Marton | | Marozsan, Fabian |
| | Italy (2) |
|---|
| Darderi, Luciano | | Fognini, Fabio |
| | | Russia (2) |
|---|
| Kotov, Pavel | | Safiullin, Roman |
|
| Serbia (5) |
|---|
| Djere, Laslo | | Djuric, Branko | | Kecmanovic, Miomir | | Lajovic, Dusan | | Medjedovic, Hamad |
| | | | United States (2) |
|---|
| Kovacevic, Aleksandar | | Nakashima, Brandon |
|