Ukrainian sensation Marta Kostyuk has won the Australian Open junior girls' title at just 14-years-old in her first grand slam appearance.
The No.11 seed defeated top-seeded Swiss Rebekah Masarova in a hard-fought final 7-5 1-6 6-4 on Rod Laver Arena on Saturday.
While Hungarian 15th seed Zsombor Piros upset 4th seed Israeli Yshai Oliel to take out the boys' title.
Kostyuk follows in the footsteps of 2017 Australian Open semi-finalist Mirjana Lucic-Baroni and world No.28 Anastasia Pavlyuchenkova, who also won the junior girls' title at Melbourne Park as 14-year-olds.
"When I start to play second set, I just started to think that it's good that I've almost won," Kostyuk said.
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"And that didn't really help me. But then I relaxed a bit more. Then it was like five games in a row.
"It's good when (the crowd) is screaming for you so much. I'm so proud."
Piros came back from a set down to claim a 4-6 6-4 6-3 victory in the boys' final.
The 17-year-old joins the ranks of former Melbourne Park boys' champions Andy Roddick, Nick Kyrgios and Bernard Tomic.
"I think it was my best match mentally," Piros said.
"I was focused all the match. That's why I won, I think.
"It was my first one, first main draw (win) in the grand slam. I still surprise myself with this win."
