![Roger Federer of Switzerland waves as he arrives to announce that he is injured and unfit to play Novak Djokovic of Serbia in the men's singles final tennis match at the ATP Roger Federer of Switzerland waves as he arrives to announce that he is injured and unfit to play Novak Djokovic of Serbia in the men's singles final tennis match at the ATP](https://c8.alamy.com/compfr/2cyn0h4/roger-federer-of-switzerland-waves-as-he-arrives-to-announce-that-he-is-injured-and-unfit-to-play-novak-djokovic-of-serbia-in-the-mens-singles-final-tennis-match-at-the-atp-world-tour-finals-at-the-o2-in-london-november-16-2014-the-33-year-old-swiss-who-spent-nearly-three-hours-late-on-saturday-beating-compatriot-stanislas-wawrinka-in-a-gruelling-semi-final-announced-his-decision-on-court-as-the-o2-arena-filled-up-for-the-expected-final-federer-who-was-bidding-for-a-seventh-title-at-the-year-ender-apologised-but-said-he-was-not-match-fit-after-developing-a-back-problem-reuters-dyla-2cyn0h4.jpg)
Roger Federer of Switzerland waves as he arrives to announce that he is injured and unfit to play Novak Djokovic of Serbia in the men's singles final tennis match at the ATP
Novak Djokovic of Serbia and Roger Federer of Switzerland pose for... Nachrichtenfoto - Getty Images
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Fall Novak Djokovic: Und wenn Roger Federer die grösste Chance seiner Karriere plötzlich sehen würde?
![Roger Federer Switzerland (R) schüttelt Hände mit Novak Djokovic Serbien nach ihrem Spiel in der Herren Finale der US Open Tennisturnier in Flushing Meadows, New York, 9. September 2007 zu gewinnen. REUTERS/Kevin Roger Federer Switzerland (R) schüttelt Hände mit Novak Djokovic Serbien nach ihrem Spiel in der Herren Finale der US Open Tennisturnier in Flushing Meadows, New York, 9. September 2007 zu gewinnen. REUTERS/Kevin](https://c8.alamy.com/compde/2e8687b/roger-federer-switzerland-r-schuttelt-hande-mit-novak-djokovic-serbien-nach-ihrem-spiel-in-der-herren-finale-der-us-open-tennisturnier-in-flushing-meadows-new-york-9-september-2007-zu-gewinnen-reuterskevin-lamarque-vereinigte-staaten-2e8687b.jpg)
Roger Federer Switzerland (R) schüttelt Hände mit Novak Djokovic Serbien nach ihrem Spiel in der Herren Finale der US Open Tennisturnier in Flushing Meadows, New York, 9. September 2007 zu gewinnen. REUTERS/Kevin
![Grand Slam Champions Roger Federer of Switzerland L and Novak Djokovic of Serbia before Semifinal Match at Australian Open 2016 Editorial Image - Image of australia, park: 184535440 Grand Slam Champions Roger Federer of Switzerland L and Novak Djokovic of Serbia before Semifinal Match at Australian Open 2016 Editorial Image - Image of australia, park: 184535440](https://thumbs.dreamstime.com/z/melbourne-australia-january-grand-slam-champions-roger-federer-switzerland-l-novak-djokovic-serbia-semifinal-match-184535440.jpg)