| Australia (3) |
|---|
| Kyrgios, Nick | | Millman, John | | Popyrin, Alexei |
| | Canada (3) |
|---|
| Auger-Aliassime, Felix | | Raonic, Milos | | Shapovalov, Denis |
| | Croazia (1) |
|---|
| Galovic, Viktor |
| | Francia (4) |
|---|
| Monfils, Gael | | Pouille, Lucas | | Simon, Gilles | | Tsonga, Jo-Wilfried |
|
| Georgia (1) |
|---|
| Basilashvili, Nikoloz |
| | Germania (6) |
|---|
| Brown, Dustin | | Gojowczyk, Peter | | Kohlschreiber, Philipp | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
| | Ungheria (1) |
|---|
| Fucsovics, Marton |
| | Italia (1) |
|---|
| Berrettini, Matteo |
|
| Lettonia (1) |
|---|
| Gulbis, Ernests |
| | Russia (2) |
|---|
| Khachanov, Karen | | Medvedev, Daniil |
| | Serbia (1) |
|---|
| Kecmanovic, Miomir |
| | Spagna (2) |
|---|
| Lopez, Feliciano | | Munar, Jaume |
|
| Stati Uniti (2) |
|---|
| Johnson, Steve | | Kudla, Denis |
|