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Alexander Zverev can challenge Federer in Halle, says tournament director | Alexander zverev, Roger federer, Tennis professional
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ATP in Halle mit Federer und Zverev live im TV, Eurosport Player und Livestream bei Eurosport - Eurosport
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Roger Federer beats Zverev to win ninth Halle title | Gerry Weber Open Halle 2017 Final Highlights - YouTube
![Halle, Germany. 25th June, 2017. Switzerland's Roger Federer (R) and Germany's Alexander Zverev stand with their trophies next to model Eva Herzigova after the ATP tennis tournament men's singles final match in Halle, Germany. 25th June, 2017. Switzerland's Roger Federer (R) and Germany's Alexander Zverev stand with their trophies next to model Eva Herzigova after the ATP tennis tournament men's singles final match in](https://c8.alamy.com/comp/JEGP9J/halle-germany-25th-june-2017-switzerlands-roger-federer-r-and-germanys-JEGP9J.jpg)