| Argentinien (2) |
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| Pella, Guido | | Schwartzman, Diego |
| | Australien (1) |
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| Kokkinakis, Thanasi |
| | Österreich (1) |
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| Thiem, Dominic |
| | Weißrussland (1) |
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| Ivashka, Ilya |
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| | Bosnien und Herzegowina (2) |
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| Basic, Mirza | | Dzumhur, Damir |
| | Bulgarien (1) |
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| Dimitrov, Grigor |
| | Kanada (3) |
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| Auger-Aliassime, Felix | | Raonic, Milos | | Shapovalov, Denis |
|
| Kroatien (2) |
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| Cilic, Marin | | Coric, Borna |
| | Tschechien (1) |
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| Berdych, Tomas |
| | Frankreich (8) |
|---|
| Benneteau, Julien | | Chardy, Jeremy | | Gasquet, Richard | | Herbert, Pierre-Hugues | | Mannarino, Adrian | | Paire, Benoit | | Pouille, Lucas | | Simon, Gilles |
| | Deutschland (6) |
|---|
| Gojowczyk, Peter | | Kohlschreiber, Philipp | | Mayer, Florian | | Struff, Jan-Lennard | | Zverev, Alexander | | Zverev, Mischa |
|
| Griechenland (1) |
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| Tsitsipas, Stefano |
| | Ungarn (1) |
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| Fucsovics, Marton |
| | Italien (4) |
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| Cecchinato, Marco | | Fognini, Fabio | | Lorenzi, Paolo | | Seppi, Andreas |
| | Japan (2) |
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| Nishikori, Kei | | Sugita, Yuichi |
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| Luxemburg (1) |
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| Muller, Gilles |
| | Monaco (1) |
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| Catarina, Lucas |
| | Die Niederlande (1) |
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| Haase, Robin |
| | Russland (3) |
|---|
| Khachanov, Karen | | Medvedev, Daniil | | Rublev, Andrey |
|
| Serbien (2) |
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| Djokovic, Novak | | Lajovic, Dusan |
| | Slowenien (1) |
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| Bedene, Aljaz |
| | Spanien (7) |
|---|
| Bautista Agut, Roberto | | Carreno Busta, Pablo | | Garcia-Lopez, Guillermo | | Lopez, Feliciano | | Nadal, Rafael | | Ramos-Vinolas, Albert | | Verdasco, Fernando |
| | Groß Britannien (1) |
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| Edmund, Kyle |
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| Vereinigte Staaten (2) |
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| Donaldson, Jared | | Sandgren, Tennys |
| |