| Argentina (3) |
|---|
| Baez, Sebastian | | Cerundolo, Francisco | | Etcheverry, Tomas Martin |
| | Australia (1) |
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| Duckworth, James |
| | | Canada (2) |
|---|
| Auger-Aliassime, Felix | | Shapovalov, Denis |
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| Chile (2) |
|---|
| Jarry, Nicolas | | Tabilo, Alejandro |
| | | | Tsjekkisk Republikk (1) |
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| Lehecka, Jiri |
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| | Frankrike (4) |
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| Fils, Arthur | | Humbert, Ugo | | Mannarino, Adrian | | Mpetshi Perricard, Giovanni |
| | Tyskland (1) |
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| Altmaier, Daniel |
| | Hellas (1) |
|---|
| Tsitsipas, Stefanos |
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| Italia (1) |
|---|
| Arnaldi, Matteo |
| | Kazakhstan (1) |
|---|
| Bublik, Alexander |
| | Nederland (2) |
|---|
| Griekspoor, Tallon | | Zandschulp, Botic van de |
| |
| | Russland (1) |
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| Rublev, Andrey |
| | Spania (2) |
|---|
| Bautista Agut, Roberto | | Martinez, Pedro |
| | Sveits (3) |
|---|
| Kym, Jerome | | Stricker, Dominic | | Wawrinka, Stan |
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