Osaka Passes Kostyuk Test to Reach Round of 16 at US Open, Djokovic Stays Perfect   (September 4, 2020) NEW YORK – No. 4 seed Naomi Osaka of Japan had to fight off 18-year-old Marta Kostyuk 6-3, 6-7 (4), 6-2 to earn a berth in the round of 16 at the US Open on Friday. The win did not come without a struggle, at the end of the second set, Osaka flung her racquet the … [Read more...] about Osaka Passes Kostyuk Test to Reach Round of 16 at US Open, Djokovic Stays Perfect, Coric Stuns Tsitsipas in Five Set Comeback