| Argentinien (1) |
|---|
| Schwartzman, Diego |
| | Bulgarien (1) |
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| Dimitrov, Grigor |
| | Kanada (2) |
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| Auger-Aliassime, Felix | | Raonic, Milos |
| | Kolumbien (1) |
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| Galan, Daniel Elahi |
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| | Frankreich (2) |
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| Mannarino, Adrian | | Paire, Benoit |
| | Deutschland (2) |
|---|
| Koepfer, Dominik | | Zverev, Alexander |
| | Griechenland (1) |
|---|
| Tsitsipas, Stefano |
|
| Italien (5) |
|---|
| Caruso, Salvatore | | Fognini, Fabio | | Gaio, Federico | | Musetti, Lorenzo | | Travaglia, Stefano |
| | Mexiko (1) |
|---|
| Lopez Villasenor, Gerardo |
| | Die Niederlande (2) |
|---|
| Griekspoor, Tallon | | Zandschulp, Botic van de |
| |
| Portugal (1) |
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| Ferreira Silva, Frederico |
| | Serbien (2) |
|---|
| Djere, Laslo | | Kecmanovic, Miomir |
| | Spanien (2) |
|---|
| Alcaraz, Carlos | | Lopez, Feliciano |
| | Groß Britannien (1) |
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| Norrie, Cameron |
|
| Vereinigte Staaten (9) |
|---|
| Isner, John | | Johnson, Steve | | Korda, Sebastian | | Kozlov, Stefan | | Kudla, Denis | | Nakashima, Brandon | | Paul, Tommy | | Sandgren, Tennys | | Tiafoe, Frances |
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