| Argentina (1) |
|---|
| Schwartzman, Diego |
| | Australien (3) |
|---|
| De Minaur, Alex | | Ebden, Matthew | | Kyrgios, Nick |
| | Bosnien og Herzegovina (1) |
|---|
| Dzumhur, Damir |
| | Canada (2) |
|---|
| Raonic, Milos | | Shapovalov, Denis |
|
| | | Frankrig (5) |
|---|
| Chardy, Jeremy | | Gasquet, Richard | | Mannarino, Adrian | | Paire, Benoit | | Simon, Gilles |
| | Tyskland (2) |
|---|
| Marterer, Maximilian | | Struff, Jan-Lennard |
|
| Grækenland (1) |
|---|
| Tsitsipas, Stefano |
| | Japan (5) |
|---|
| Daniel, Taro | | Nishikori, Kei | | Nishioka, Yoshihito | | Sugita, Yuichi | | Watanuki, Yosuke |
| | | Rusland (1) |
|---|
| Medvedev, Daniil |
|
| Slovakiet (1) |
|---|
| Klizan, Martin |
| | Sydafrika (1) |
|---|
| Anderson, Kevin |
| | | Schweizisk (1) |
|---|
| Wawrinka, Stan |
|
| USA (4) |
|---|
| Fritz, Taylor | | Johnson, Steve | | Kudla, Denis | | Tiafoe, Frances |
|