| Argentina (1) |
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| Pella, Guido |
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| Thompson, Jordan |
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| Rodionov, Jurij |
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| Auger-Aliassime, Felix | | Pospisil, Vasek |
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| Humbert, Ugo | | Monfils, Gael | | Moutet, Corentin | | Rinderknech, Arthur | | Simon, Gilles |
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| Basilashvili, Nikoloz |
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| Germania (6) |
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| Altmaier, Daniel | | Hanfmann, Yannick | | Koepfer, Dominik | | Kohlschreiber, Philipp | | Struff, Jan-Lennard | | Zverev, Alexander |
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| Giron, Marcos | | Korda, Sebastian | | Querrey, Sam |
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