
Uzbekistan's Denis Istomin reacts during the fourth round match against Bulgaria's Grigor Dimitrov at the Australian Open Tennis Championships in Melbourne, Australia, Jan. 23, 2017. (Xinhua/Lui Siu Wai)

Uzbekistan's Denis Istomin reacts during the fourth round match against Bulgaria's Grigor Dimitrov at the Australian Open Tennis Championships in Melbourne, Australia, Jan. 23, 2017. (Xinhua/Lui Siu Wai)
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