Roger Federer is on an eight-match unbeaten run at the Australian Open but there is one 15-year-old Ukrainian who is on a longer winning streak at the year's first major. Guess who? Marta Kostyuk. The girls' champion at the Australian Open last year, Kostyuk beat Olivia Rogowska 6-3, 7-5 on Wednesday to enter third round -- and take her unbeaten streak to 11 at the Grand Slam. She will next face fourth-seeded countrywoman Elina Svitolina.
Here are five lesser-known facts about the fast-rising Kostyuk:
* World No. 522 Kostyuk advanced to the main draw after winning three qualifying matches. She's the first player born after 2002 to win a Grand Slam match. Speaking after qualifying for the main draw, she had said, "Age is nothing to me, I don't think about my age when I play, but to be young is sometimes an opportunity. The older girls can get a bit tight when I start to win."
* Kostyuk got a wild card for the qualifiers by virtue of being the 2017 girls' winner. Interestingly, her career prize money before this tournament stood at $6,733. She's assured of $113,000 (approx.) by virtue of making the third round this time.
* Kostyuk defeated world No. 27 Shuai Peng in the opening round to become the youngest player to win a main-draw match at Melbourne Park since Martina Hingis in 1996. While her win was spectacular, the celebration that was followed was even more breathtaking.
When you qualify for your first Grand Slam and then knock out the No. 25 seed in the opening round, all while still just 15 years old. ������ @marta_kostyuk pic.twitter.com/WmK0lI6rVT
- ITF (@ITF_Tennis) 15 January 2018
* Kostyuk is also the youngest player to reach the third round at any Slam since Mirjana Lucic-Baroni did so at the 1997 US Open. Speaking about how she plans to play against Svitolina, she said, "I will just enjoy it. I think I'm going to play on big court again. I will just try to show my best tennis, because I'm pretty sure, like all my opponents, she will struggle a little bit, and I will try to use this. That's what I'm going to do. I know a little bit how Elina is playing, but I still didn't go to the details."
* Kostyuk is managed by Ivan Ljubicic, who is Federer's current coach.
With inputs from ESPN Stats and Information Group