| Argentina (3) |
|---|
| Baez, Sebastian | | Cerundolo, Francisco | | Schwartzman, Diego |
| | Australia (3) |
|---|
| De Minaur, Alex | | Kokkinakis, Thanasi | | Kyrgios, Nick |
| | | Bulgaria (1) |
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| Dimitrov, Grigor |
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| Canada (2) |
|---|
| Auger-Aliassime, Felix | | Shapovalov, Denis |
| | Kroatia (2) |
|---|
| Cilic, Marin | | Coric, Borna |
| | | Finland (1) |
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| Ruusuvuori, Emil |
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| Frankrike (1) |
|---|
| Bonzi, Benjamin |
| | Georgia (1) |
|---|
| Basilashvili, Nikoloz |
| | Hellas (1) |
|---|
| Tsitsipas, Stefanos |
| | Italia (5) |
|---|
| Berrettini, Matteo | | Fognini, Fabio | | Musetti, Lorenzo | | Sinner, Jannik | | Sonego, Lorenzo |
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| Nederland (1) |
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| Zandschulp, Botic van de |
| | | | Russland (4) |
|---|
| Karatsev, Aslan | | Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
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| Serbia (2) |
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| Kecmanovic, Miomir | | Krajinovic, Filip |
| | | Spania (7) |
|---|
| Alcaraz, Carlos | | Bautista Agut, Roberto | | Carreno Busta, Pablo | | Davidovich Fokina, Alejandro | | Munar, Jaume | | Nadal, Rafael | | Ramos-Vinolas, Albert |
| | Sveits (2) |
|---|
| Laaksonen, Henri | | Wawrinka, Stan |
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| England (3) |
|---|
| Evans, Daniel | | Murray, Andy | | Norrie, Cameron |
| | Amerika (12) |
|---|
| Brooksby, Jenson | | Cressy, Maxime | | Fritz, Taylor | | Giron, Marcos | | Isner, John | | Korda, Sebastian | | McDonald, Mackenzie | | Nakashima, Brandon | | Paul, Tommy | | Shelton, Ben | | Tiafoe, Frances | | Wolf, J.J. |
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