| Argentina (3) |
|---|
| Cerundolo, Francisco | | Etcheverry, Tomas Martin | | Ugo Carabelli, Camilo |
| | Australia (2) |
|---|
| De Minaur, Alex | | Popyrin, Alexei |
| | Austria (2) |
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| Misolic, Filip | | Rodionov, Jurij |
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| Dzumhur, Damir |
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| Chile (1) |
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| Tabilo, Alejandro |
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| Machac, Tomas |
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| Moutet, Corentin |
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| Altmaier, Daniel | | Zverev, Alexander |
|
| Greece (1) |
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| Tsitsipas, Stefanos |
| | Italy (6) |
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| Arnaldi, Matteo | | Berrettini, Matteo | | Cobolli, Flavio | | Darderi, Luciano | | Musetti, Lorenzo | | Sinner, Jannik |
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| | | Russia (3) |
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| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
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| Medjedovic, Hamad |
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| Fearnley, Jacob | | Norrie, Cameron |
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| Kovacevic, Aleksandar | | Michelsen, Alex | | Nakashima, Brandon |
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