| Argentina (1) |
|---|
| Schwartzman, Diego |
| | Australia (5) |
|---|
| De Minaur, Alex | | Kyrgios, Nick | | Millman, John | | Popyrin, Alexei | | Thompson, Jordan |
| | | Francia (1) |
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| Mannarino, Adrian |
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| Germania (3) |
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| Gojowczyk, Peter | | Zverev, Alexander | | Zverev, Mischa |
| | Italia (2) |
|---|
| Gaio, Federico | | Seppi, Andreas |
| | Giappone (1) |
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| Nishioka, Yoshihito |
| | Messico (1) |
|---|
| Lopez Villasenor, Gerardo |
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| | | Spagna (5) |
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| Ferrer, David | | Garcia-Lopez, Guillermo | | Granollers, Marcel | | Lopez, Feliciano | | Nadal, Rafael |
| | Svizzera (1) |
|---|
| Wawrinka, Stan |
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| Regno Unito (1) |
|---|
| Norrie, Cameron |
| | Stati Uniti (9) |
|---|
| Fritz, Taylor | | Harrison, Ryan | | Isner, John | | Johnson, Steve | | McDonald, Mackenzie | | Nava, Emilio | | Querrey, Sam | | Sandgren, Tennys | | Tiafoe, Frances |
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