![Stuttgart, Germany. 11th June, 2017. Roger Federer from Switzerland during a training session for the Mercedes Cup in Stuttgart, Germany, 11 June 2017. Photo: Daniel Maurer/dpa/Alamy Live News Stock Photo - Alamy Stuttgart, Germany. 11th June, 2017. Roger Federer from Switzerland during a training session for the Mercedes Cup in Stuttgart, Germany, 11 June 2017. Photo: Daniel Maurer/dpa/Alamy Live News Stock Photo - Alamy](https://c8.alamy.com/comp/JBHKJX/stuttgart-germany-11th-june-2017-roger-federer-from-switzerland-during-JBHKJX.jpg)
Stuttgart, Germany. 11th June, 2017. Roger Federer from Switzerland during a training session for the Mercedes Cup in Stuttgart, Germany, 11 June 2017. Photo: Daniel Maurer/dpa/Alamy Live News Stock Photo - Alamy
![Roger Federer's comeback cut short in Stuttgart as 18-time Grand Slam champion loses to veteran Tommy Haas | The Independent | The Independent Roger Federer's comeback cut short in Stuttgart as 18-time Grand Slam champion loses to veteran Tommy Haas | The Independent | The Independent](https://static.independent.co.uk/s3fs-public/thumbnails/image/2017/06/14/18/roger-federer-stuttgart.jpg?width=1200)
Roger Federer's comeback cut short in Stuttgart as 18-time Grand Slam champion loses to veteran Tommy Haas | The Independent | The Independent
![Stuttgart, Germany. 14th June, 2017. Roger Federer of Switzerland plays against Haas of Germany during the round of the last sixteen in Stuttgart, Germany, 14 June 2017. Photo: Daniel Maurer/dpa/Alamy Live News Stuttgart, Germany. 14th June, 2017. Roger Federer of Switzerland plays against Haas of Germany during the round of the last sixteen in Stuttgart, Germany, 14 June 2017. Photo: Daniel Maurer/dpa/Alamy Live News](https://c8.alamy.com/comp/JC8RJA/stuttgart-germany-14th-june-2017-roger-federer-of-switzerland-plays-JC8RJA.jpg)
Stuttgart, Germany. 14th June, 2017. Roger Federer of Switzerland plays against Haas of Germany during the round of the last sixteen in Stuttgart, Germany, 14 June 2017. Photo: Daniel Maurer/dpa/Alamy Live News
![Roger Federer auf Titeljagd in Stuttgart und Halle - live bei Eurosport und im Eurosport Player - Eurosport Roger Federer auf Titeljagd in Stuttgart und Halle - live bei Eurosport und im Eurosport Player - Eurosport](https://i.eurosport.com/2017/01/29/2013931-42274107-2560-1440.jpg)
Roger Federer auf Titeljagd in Stuttgart und Halle - live bei Eurosport und im Eurosport Player - Eurosport
![Stuttgart, Germany. 14th June, 2017. Switzerland's Roger Federer serves during a 2nd round match of Mercedes Cup tennis tournament with Germany's Tommy Haas in Stuttgart, Germany, on June 14, 2017. Roger Federer Stuttgart, Germany. 14th June, 2017. Switzerland's Roger Federer serves during a 2nd round match of Mercedes Cup tennis tournament with Germany's Tommy Haas in Stuttgart, Germany, on June 14, 2017. Roger Federer](https://c8.alamy.com/comp/JC9054/stuttgart-germany-14th-june-2017-switzerlands-roger-federer-serves-JC9054.jpg)