| Argentina (1) |
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| Cerundolo, Francisco |
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| Popyrin, Alexei | | Vukic, Aleksandar |
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| Misolic, Filip | | Ofner, Sebastian | | Thiem, Dominic |
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| Dimitrov, Grigor |
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| Gojo, Borna |
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| Lehecka, Jiri | | Machac, Tomas |
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| Fils, Arthur | | Monfils, Gael | | Muller, Alexandre |
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| Altmaier, Daniel | | Zverev, Alexander |
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| Tsitsipas, Stefanos |
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| Arnaldi, Matteo | | Musetti, Lorenzo | | Sinner, Jannik | | Sonego, Lorenzo |
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| Karatsev, Aslan | | Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey | | Safiullin, Roman |
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| Ramos-Vinolas, Albert |
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| Velká Británie (2) |
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| Evans, Daniel | | Norrie, Cameron |
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| Paul, Tommy | | Shelton, Ben | | Tiafoe, Frances | | Wolf, J.J. |
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