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Viktor Durasovic of Norway competes during the ATP Cup Group D match against Karen Khachanov of Russia in Perth, Australia, on Jan. 7, 2020. (Photo by Zhou Dan/Xinhua)
Viktor Durasovic of Norway competes during the ATP Cup Group D match against Karen Khachanov of Russia in Perth, Australia, on Jan. 7, 2020. (Photo by Zhou Dan/Xinhua)