| Argentina (2) |
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| Pella, Guido | | Schwartzman, Diego |
| | Australien (1) |
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| Kokkinakis, Thanasi |
| | | Hviderusland (1) |
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| Ivashka, Ilya |
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| Basic, Mirza | | Dzumhur, Damir |
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| Dimitrov, Grigor |
| | Canada (3) |
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| Auger-Aliassime, Felix | | Raonic, Milos | | Shapovalov, Denis |
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| Kroatien (2) |
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| Cilic, Marin | | Coric, Borna |
| | Tjekkiet (1) |
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| Berdych, Tomas |
| | Frankrig (8) |
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| Benneteau, Julien | | Chardy, Jeremy | | Gasquet, Richard | | Herbert, Pierre-Hugues | | Mannarino, Adrian | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles |
| | Tyskland (6) |
|---|
| Gojowczyk, Peter | | Kohlschreiber, Philipp | | Mayer, Florian | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
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| Grækenland (1) |
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| Tsitsipas, Stefano |
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| Fucsovics, Marton |
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| Cecchinato, Marco | | Fognini, Fabio | | Lorenzi, Paolo | | Seppi, Andreas |
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| Nishikori, Kei | | Sugita, Yuichi |
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| Muller, Gilles |
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| Catarina, Lucas |
| | | Rusland (3) |
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| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
|
| Serbien (2) |
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| Djokovic, Novak | | Lajovic, Dusan |
| | Slovenien (1) |
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| Bedene, Aljaz |
| | Spanien (7) |
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| Bautista Agut, Roberto | | Carreno Busta, Pablo | | Garcia-Lopez, Guillermo | | Lopez, Feliciano | | Nadal, Rafael | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
| | Storbritannien (1) |
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| Edmund, Kyle |
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| USA (2) |
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| Donaldson, Jared | | Sandgren, Tennys |
| |