| Argentina (2) |
|---|
| Andreozzi, Guido | | Schwartzman, Diego |
| | Australia (6) |
|---|
| De Minaur, Alex | | Duckworth, James | | Ebden, Matthew | | Millman, John | | Popyrin, Alexei | | Thompson, Jordan |
| | | Francia (4) |
|---|
| Chardy, Jeremy | | Mannarino, Adrian | | Pouille, Lucas | | Simon, Gilles |
|
| Grecia (1) |
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| Tsitsipas, Stefano |
| | Ungheria (1) |
|---|
| Fucsovics, Marton |
| | | Giappone (2) |
|---|
| Daniel, Taro | | Nishioka, Yoshihito |
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| Russia (2) |
|---|
| Medvedev, Daniil | | Rublev, Andrey |
| | | Slovacchia (1) |
|---|
| Klizan, Martin |
| | Spagna (2) |
|---|
| Garcia-Lopez, Guillermo | | Ramos-Vinolas, Albert |
|
| | Stati Uniti (5) |
|---|
| Harrison, Ryan | | Kudla, Denis | | Opelka, Reilly | | Querrey, Sam | | Tiafoe, Frances |
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