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![Roger Federer (ATP 2) in action during the match between Roger Federer (ATP 2) of Switzerland and Hyeon Chung (ATP 58) of South Korea in the Men's Semi Finald at the 'Australian Roger Federer (ATP 2) in action during the match between Roger Federer (ATP 2) of Switzerland and Hyeon Chung (ATP 58) of South Korea in the Men's Semi Finald at the 'Australian](https://c8.alamy.com/comp/2M2CFER/roger-federer-atp-2-in-action-during-the-match-between-roger-federer-atp-2-of-switzerland-and-hyeon-chung-atp-58-of-south-korea-in-the-mens-semi-finald-at-the-australian-open-tennis-grand-slam-friday-26-january-2018-in-melbourne-park-melbourne-australia-this-first-grand-slam-of-the-season-takes-place-from-15-to-28-january-belga-photo-patrick-hamilton-2M2CFER.jpg)