Argentina (2) |
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Del Potro, Juan Martin | Mayer, Leonardo |
| Bulgarien (1) |
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Dimitrov, Grigor |
| Canada (1) |
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Pospisil, Vasek |
| |
| Cypern (1) |
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Baghdatis, Marcos |
| Frankrig (1) |
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Monfils, Gael |
| Georgien (1) |
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Basilashvili, Nikoloz |
|
Tyskland (3) |
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Gojowczyk, Peter | Zverev, Alexander | Zverev, Mischa |
| Ungarn (1) |
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Fucsovics, Marton |
| Italien (4) |
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Berrettini, Matteo | Cecchinato, Marco | Fognini, Fabio | Seppi, Andreas |
| |
| Rusland (2) |
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Khachanov, Karen | Rublev, Andrey |
| Serbien (2) |
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Krajinovic, Filip | Lajovic, Dusan |
| Spanien (4) |
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Bautista Agut, Roberto | Lopez, Feliciano | Ramos-Vinolas, Albert | Verdasco, Fernando |
|
Tunesien (1) |
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Jaziri, Malek |
| Storbritannien (1) |
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Edmund, Kyle |
| USA (4) |
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Harrison, Ryan | Querrey, Sam | Sandgren, Tennys | Sock, Jack |
|