She then beat former semifinalist and 31st seed Anastasija Sevastova.
In the third round, she met former champion and world No. 9, Naomi Osaka.
She overcame a first set deficit by winning the second in a tie-breaker, but was beaten in the third.
At the WTA 500 Abu Dhabi Open, she reached the semifinals defeating Lucie Hradecká, Hsieh Su-wei, Tamara Zidanšek and Sara Sorribes Tormo.
1932
At the Australian Open, she reached the third round defeating 32nd seed Sorribes Tormo, before losing to world No. 6, Paula Badosa.
At the Eastbourne International, she defeated seventh seed Barbora Krejčíková to reach the third round.
1980
She was also coached by her maternal uncle Taras Beiko, who had played for the USSR and Ukraine in the late 1980s and early 1990s.
In March 2023, Kostyuk announced her engagement, and in November 2023 she married her fiance Hryhoriy.
1994
Her father was the technical director of the Antey Cup, a junior tennis tournament in Kyiv; her mother was a professional tennis player who reached a career-high WTA ranking of No. 391, and won a $10k title in her home city of Kyiv in 1994, and represented a Ukrainian tennis team.
Kostyuk is the younger sister of Mariya Kostyuk, who competed for Chicago State University and Southeast Missouri State University, and a cousin of professional football players Vadym and Miro Slavov and gymnast Oksana Slavova.
Kostyuk started playing tennis at a young age at the Antey Tennis Club, on the west side of Kyiv, coached by her mother.
She described her initial experience in tennis at age five: "My mom was always working a lot as a coach, and the first time I went to the courts to train, I just understood that if I started doing tennis, I'd get to spend more time with my mom. So that was kind of my motivation – if I played tennis, I'd be around her more often".
1996
By defeating Peng Shuai in the first round, Kostyuk became the youngest player to win a main-draw match in Melbourne since Martina Hingis in 1996.
In the second round, she defeated Australian wildcard Olivia Rogowska in straight sets.
1997
In doing this, she became the youngest player to reach the third round of a Grand Slam event since Mirjana Lučić-Baroni reached the same stage at the 1997 US Open.
However, she fell in round three to fourth seed and compatriot player Elina Svitolina.
2002
Marta Olehivna Kostyuk (Марта Олегівна Костюк; born 28 June 2002) is a Ukrainian professional tennis player.
She has career-high rankings of world No. 28 in singles, achieved on 29 January 2024, and No. 27 in doubles, achieved on 8 May 2023.
On the WTA Tour, she has won one singles title (at the 2023 ATX Open) and two doubles titles (2022 Slovenia Open and 2023 Birmingham Classic).
Her best major singles result is reaching the quarterfinals of the 2024 Australian Open.
Kostyuk is the daughter of Oleh Kostyuk and his wife, Talina Beiko.
Having received a wildcard entry into the qualifying tournament, she defeated Arina Rodionova, Daniela Seguel and Barbora Krejčíková to become the first player born in 2002 to play in a Grand Slam main draw.
2012
At the French Open, she defeated former French Open champion and 12th seed, Garbiñe Muguruza, in the first round, 6–1, 6–4.
In the fourth round, her best Grand Slam showing, she was defeated by the defending champion, Iga Świątek.
Kostyuk reached the top 50 on 1 November 2021, her best career ranking.
2015
In December 2015, Marta won the "14-and-under" competition at the Junior Orange Bowl in Florida.
2016
The following month, she won the 2016 Petits As in Tarbes, France, in both singles and doubles (with Kamilla Bartone).
2017
In January 2017, Kostyuk won the girls' singles title at the Australian Open, defeating Rebeka Masarova in the final.
In May, she won an ITF tournament in Dunakeszi (Hungary) without dropping a set, becoming the youngest Ukrainian to win a professional singles title.
In September, Kostyuk and Olga Danilović won the girls' doubles title at the US Open.
In October, she won the year-end junior girls tournament, the ITF Junior Masters in Chengdu, China, defeating Kaja Juvan in the final.
On 30 October 2017, Kostyuk achieved a career-high junior ranking of world No. 2.
Kostyuk made her main draw tour-level debut at the Australian Open.
2018
Kostyuk won the Burnie International, a $60k tournament in Australia, in February 2018, and reached the final of the Zhuhai Open in March, also a $60k event, but did not sustain her level of success in the rest of the year.
2019
In 2019, she won two further ITF Circuit titles, and reached the quarterfinals of the WTA tournament at Strasbourg as a qualifier where she lost to fourth seed Caroline Garcia.
She finished the season ranked No. 155.
In February, Kostyuk won the $60k Cairo Open.
She also won the doubles tournament in Cairo, playing with Kamilla Rakhimova.
Following the break in the season caused by the COVID-19 pandemic, she competed in the Palermo Ladies Open qualifying, reaching the second round, and came through the qualifying to enter the main draw of the Prague Open.
At the US Open, she beat former top-10 player Daria Kasatkina, in straight sets in the first round.
