| Argentina (3) |
|---|
| Baez, Sebastian | | Cerundolo, Francisco | | Schwartzman, Diego |
| | Australien (2) |
|---|
| De Minaur, Alex | | Popyrin, Alexei |
| | | Hviderusland (1) |
|---|
| Ivashka, Ilya |
|
| | Bulgarien (1) |
|---|
| Dimitrov, Grigor |
| | |
| Tjekkiet (1) |
|---|
| Lehecka, Jiri |
| | | Finland (1) |
|---|
| Ruusuvuori, Emil |
| | Frankrig (3) |
|---|
| Bonzi, Benjamin | | Gasquet, Richard | | Humbert, Ugo |
|
| Tyskland (2) |
|---|
| Struff, Jan-Lennard | | Zverev, Alexander |
| | Grækenland (1) |
|---|
| Tsitsipas, Stefanos |
| | Ungarn (1) |
|---|
| Fucsovics, Marton |
| | Italien (5) |
|---|
| Berrettini, Matteo | | Musetti, Lorenzo | | Nardi, Luca | | Sinner, Jannik | | Sonego, Lorenzo |
|
| Kasakhstan (1) |
|---|
| Bublik, Alexander |
| | Monaco (1) |
|---|
| Vacherot, Valentin |
| | Holland (2) |
|---|
| Griekspoor, Tallon | | Zandschulp, Botic van de |
| |
| | Rusland (4) |
|---|
| Gakhov, Ivan | | Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
| | Serbien (5) |
|---|
| Djere, Laslo | | Djokovic, Novak | | Kecmanovic, Miomir | | Krajinovic, Filip | | Lajovic, Dusan |
| | Spanien (5) |
|---|
| Bautista Agut, Roberto | | Davidovich Fokina, Alejandro | | Munar, Jaume | | Ramos-Vinolas, Albert | | Zapata Miralles, Bernabe |
|
| Schweizisk (2) |
|---|
| Huesler, Marc-Andrea | | Wawrinka, Stan |
| | Storbritannien (4) |
|---|
| Draper, Jack | | Evans, Daniel | | Murray, Andy | | Norrie, Cameron |
| | USA (4) |
|---|
| Cressy, Maxime | | Fritz, Taylor | | McDonald, Mackenzie | | Shelton, Ben |
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