Australian Open 2018: Marta Kostyuk, 15, reaches third round

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Fifteen-year-old Marta Kostyuk of Ukraine becomes the youngest player since 1997 to reach the third round of a Grand Slam by beating Olivia Rogowska in the Australian Open.

READ MORE: Kostyuk reaches third round

READ MORE: Dimitrov digs deep to avoid shock defeat

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BBC Sport
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Tennis