| Argentina (2) |
|---|
| Cerundolo, Francisco | | Schwartzman, Diego |
| | Australien (1) |
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| De Minaur, Alex |
| | Bulgarien (1) |
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| Dimitrov, Grigor |
| | Canada (1) |
|---|
| Shapovalov, Denis |
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| | Finland (1) |
|---|
| Ruusuvuori, Emil |
| | Frankrig (1) |
|---|
| Halys, Quentin |
| | Italien (3) |
|---|
| Berrettini, Matteo | | Musetti, Lorenzo | | Sonego, Lorenzo |
|
| Kasakhstan (1) |
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| Bublik, Alexander |
| | Holland (1) |
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| Zandschulp, Botic van de |
| | | Serbien (1) |
|---|
| Krajinovic, Filip |
|
| Spanien (3) |
|---|
| Davidovich Fokina, Alejandro | | Martinez, Pedro | | Ramos-Vinolas, Albert |
| | Schweizisk (1) |
|---|
| Wawrinka, Stan |
| | Storbritannien (7) |
|---|
| Broady, Liam | | Draper, Jack | | Evans, Daniel | | Jubb, Paul | | Murray, Andy | | Norrie, Cameron | | Peniston, Ryan |
| | USA (7) |
|---|
| Brooksby, Jenson | | Fritz, Taylor | | Kudla, Denis | | Opelka, Reilly | | Paul, Tommy | | Querrey, Sam | | Tiafoe, Frances |
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