(200130) -- MELBOURNE, Jan. 30, 2020 (Xinhua) -- Roger Federer of Switzerland speaks at the post-match press conference after the men's singles semifinal match against Novak Djokovic of Serbia at the Australian Open tennis tournament in Melbourne, Australia on Jan. 30, 2020., Image: 495602368, License: Rights-managed, Restrictions: , Model Release: no, Credit line: Bai Xue / Xinhua News / Profimedia