| Argentina (3) |
|---|
| Londero, Juan Ignacio | | Pella, Guido | | Schwartzman, Diego |
| | Brasile (1) |
|---|
| Monteiro, Thiago |
| | | Francia (2) |
|---|
| Humbert, Ugo | | Paire, Benoit |
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| Germania (7) |
|---|
| Kohlschreiber, Philipp | | Maden, Yannick | | Marterer, Maximilian | | Molleker, Rudolf | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
| | Ungheria (1) |
|---|
| Fucsovics, Marton |
| | Italia (4) |
|---|
| Berrettini, Matteo | | Cecchinato, Marco | | Seppi, Andreas | | Sonego, Lorenzo |
| |
| Lettonia (1) |
|---|
| Gulbis, Ernests |
| | | Russia (1) |
|---|
| Khachanov, Karen |
| | Slovacchia (1) |
|---|
| Klizan, Martin |
|
| Spagna (1) |
|---|
| Bautista Agut, Roberto |
| | Regno Unito (1) |
|---|
| Edmund, Kyle |
| | Stati Uniti (1) |
|---|
| Kudla, Denis |
| | Usbechistan (1) |
|---|
| Istomin, Denis |
|