| Australia (2) |
|---|
| Millman, John | | O'Connell, Christopher |
| | Austria (1) |
|---|
| Thiem, Dominic |
| | | Canada (2) |
|---|
| Pospisil, Vasek | | Shapovalov, Denis |
|
| | France (2) |
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| Chardy, Jeremy | | Gasquet, Richard |
| | Georgia (1) |
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| Basilashvili, Nikoloz |
| | Hungary (1) |
|---|
| Fucsovics, Marton |
|
| India (1) |
|---|
| Ramanathan, Ramkumar |
| | | Kazakhstan (1) |
|---|
| Bublik, Alexander |
| | Qatar (1) |
|---|
| Zayid, Mubarak Shannan |
|
| Russia (2) |
|---|
| Karatsev, Aslan | | Rublev, Andrey |
| | Serbia (2) |
|---|
| Krajinovic, Filip | | Lajovic, Dusan |
| | Slovakia (1) |
|---|
| Gombos, Norbert |
| |
| South Africa (1) |
|---|
| Harris, Lloyd |
| | Spain (1) |
|---|
| Bautista Agut, Roberto |
| | Switzerland (2) |
|---|
| Federer, Roger | | Wawrinka, Stan |
| |
| United Kingdom (1) |
|---|
| Evans, Daniel |
| | United States (2) |
|---|
| Fritz, Taylor | | Opelka, Reilly |
|