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(170112) -- MELBOURNE, Jan. 12, 2017 (Xinhua) -- Novak Djokovic of Serbia attends a training session ahead of Australian Open 2017 at Melbourne Park in Melbourne, Australia, Jan. 12, 2017. Australian Open 2017 will take place at Melbourne Park from Jan. 16 to Jan. 29. (Xinhua/Bai Xue) 11.01.2017 Melbourne Tenis Novak Djokovic zagra? w charytatwynym meczu Xinhua / Sportida / PressFocus POLAND ONLY!!