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15-year-old Kostyuk beats 25th seeded in Australian Open
Marta Kostyuk, a 15-year-old qualifier from Ukraine who beat 25th-seeded Peng Shuai in the first round in the Australian Open, has advanced to the third with a 6-3, 7-5 win over Olivia Rogowska, a wild-card entry from Australia. Kostyuk, who entered the tournament ranked No. 521, had already played six