![Halle, Germany. 23rd June, 2017. Roger Federer of Switzerland returns the ball during the men's singles quarterfinal match against Florian Mayer of Germany in the Gerry Weber Open 2017 in Halle, Germany, Halle, Germany. 23rd June, 2017. Roger Federer of Switzerland returns the ball during the men's singles quarterfinal match against Florian Mayer of Germany in the Gerry Weber Open 2017 in Halle, Germany,](https://c8.alamy.com/comp/JEDB3J/halle-germany-23rd-june-2017-roger-federer-of-switzerland-returns-JEDB3J.jpg)
Halle, Germany. 23rd June, 2017. Roger Federer of Switzerland returns the ball during the men's singles quarterfinal match against Florian Mayer of Germany in the Gerry Weber Open 2017 in Halle, Germany,
![Roger Federer beats Zverev to win ninth Halle title | Gerry Weber Open Halle 2017 Final Highlights - YouTube Roger Federer beats Zverev to win ninth Halle title | Gerry Weber Open Halle 2017 Final Highlights - YouTube](https://i.ytimg.com/vi/EnVvmJZCOMQ/maxresdefault.jpg)
Roger Federer beats Zverev to win ninth Halle title | Gerry Weber Open Halle 2017 Final Highlights - YouTube
![Go Roger Federer on Twitter: "Roger Federer's first practice session on grass ahead of Stuttgart, Halle and Wimbledon. #KingOfGrass https://t.co/Nf1q0E10Kw" / Twitter Go Roger Federer on Twitter: "Roger Federer's first practice session on grass ahead of Stuttgart, Halle and Wimbledon. #KingOfGrass https://t.co/Nf1q0E10Kw" / Twitter](https://pbs.twimg.com/media/DCEV8tMUAAAVfZh.jpg)