Australian Open 2018: Marta Kostyuk, 15, reaches third round
Fifteen-year-old Marta Kostyuk becomes the youngest player since 1997 to reach the third round of a Grand Slam by beating Olivia Rogowska in the Australian Open.
Fifteen-year-old Marta Kostyuk becomes the youngest player since 1997 to reach the third round of a Grand Slam by beating Olivia Rogowska in the Australian Open.