| Argentina (5) |
|---|
| Cachin, Pedro | | Cerundolo, Francisco | | Etcheverry, Tomas Martin | | Schwartzman, Diego | | Trungelliti, Marco |
| | Australia (2) |
|---|
| De Minaur, Alex | | Kubler, Jason |
| | Bielorussia (1) |
|---|
| Ivashka, Ilya |
| |
| Bulgaria (1) |
|---|
| Dimitrov, Grigor |
| | Canada (1) |
|---|
| Shapovalov, Denis |
| | |
| | Finlandia (1) |
|---|
| Ruusuvuori, Emil |
| | Grecia (1) |
|---|
| Tsitsipas, Stefanos |
| | Ungheria (1) |
|---|
| Balazs, Attila |
|
| Italia (5) |
|---|
| Arnaldi, Matteo | | Giustino, Lorenzo | | Musetti, Lorenzo | | Passaro, Francesco | | Sinner, Jannik |
| | Giappone (1) |
|---|
| Nishioka, Yoshihito |
| | Kazakistan (2) |
|---|
| Bublik, Alexander | | Shevchenko, Alexander |
| |
| | Portogallo (1) |
|---|
| Borges, Nuno |
| | Russia (2) |
|---|
| Khachanov, Karen | | Kotov, Pavel |
| | Slovacchia (1) |
|---|
| Kovalik, Jozef |
|
| Spagna (11) |
|---|
| Alcaraz, Carlos | | Andujar, Pablo | | Bautista Agut, Roberto | | Davidovich Fokina, Alejandro | | Lopez, Feliciano | | Martinez, Pedro | | Munar, Jaume | | Ramos-Vinolas, Albert | | Rincon, Daniel | | Verdasco, Fernando | | Zapata Miralles, Bernabe |
| | Ucraina (1) |
|---|
| Krutykh, Oleksii |
| | Regno Unito (2) |
|---|
| Evans, Daniel | | Norrie, Cameron |
| | Stati Uniti (3) |
|---|
| McDonald, Mackenzie | | Shelton, Ben | | Tiafoe, Frances |
|