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Novak Djokovic of Serbia serves the ball during the men's singles second round match against Jo-Wilfried Tsonga of France at the Australian Open in Melbourne, Australia, Jan. 17, 2019. (Xinhua/Bai Xuefei)
Highlights of 2019 Australian Open Day 4
Source: Xinhua| 2019-01-17 16:01:04|Editor: ZD
