| Argentina (3) |
|---|
| Londero, Juan Ignacio | | Pella, Guido | | Schwartzman, Diego |
| | Brasil (1) |
|---|
| Monteiro, Thiago |
| | Chile (1) |
|---|
| Garin, Christian |
| | Frankrike (2) |
|---|
| Humbert, Ugo | | Paire, Benoit |
|
| Tyskland (7) |
|---|
| Kohlschreiber, Philipp | | Maden, Yannick | | Marterer, Maximilian | | Molleker, Rudolf | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
| | Ungarn (1) |
|---|
| Fucsovics, Marton |
| | Italia (4) |
|---|
| Berrettini, Matteo | | Cecchinato, Marco | | Seppi, Andreas | | Sonego, Lorenzo |
| |
| Latvia (1) |
|---|
| Gulbis, Ernests |
| | | Russland (1) |
|---|
| Khachanov, Karen |
| | Slovakia (1) |
|---|
| Klizan, Martin |
|
| Spania (1) |
|---|
| Bautista Agut, Roberto |
| | | | Uzbekistan (1) |
|---|
| Istomin, Denis |
|