Marta Kostyuk

In December 2015, Marta won the "14-and-under" competition at the Orange Bowl in Florida.[7] The following month, she won the 2016 Petits As in Tarbes, France, in both singles and doubles (with Kamilla Bartone).[8]

In January 2017, Kostyuk won the Australian Open girls' singles championships.[9] In May, she won an ITF tournament in Dunakeszi (Hungary) without dropping a set, becoming the youngest Ukrainian to win a professional singles title.[10] In September, she won the girls' doubles title at the US Open, playing with Olga Danilović.[11] In October, she won the year-end junior girls tournament, the ITF Junior Masters in Chengdu, China.[12]

On 30 October 2017, Kostyuk achieved a career-high junior ranking of world No. 2.

Kostyuk at the 2019 Bella Cup

Kostyuk made her main draw tour-level debut at the Australian Open. 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. 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.[13] In the second round, she defeated Australian wildcard Olivia Rogowska in straight sets. 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.[14] However, she fell in round three to fourth seed and compatriot player Elina Svitolina.

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.

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 Cairo doubles tournament, 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. She then beat former semifinalist and 31st seed Anastasija Sevastova.[15] 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.[16][17]

At the WTA 500 Abu Dhabi Open she reached the semifinals defeating Lucie Hradecká, Hsieh Su-wei, Tamara Zidanšek and Sara Sorribes Tormo.

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.

At the Australian Open, she reached the third round defeating 32nd seed Sorribes Tormo, before losing to world No. 6 and eighth seed, Paula Badosa.[18]

At the Eastbourne International, she defeated seventh seed Barbora Krejčíková to reach the third round.[19]

She reached the semifinals at the Championnats de Granby where she lost to Daria Saville, after withdrawing from the match.

At the WTA 500 Adelaide International 1, she went through qualifying and on to the quarterfinals, beating reigning Wimbledon champion Elena Rybakina en route. She defeated 28th seed Amanda Anisimova and Olivia Gadecki to reach the third round at the Australian Open for the third time. In doubles at the same tournament, she reached the semifinals partnering Elena-Gabriela Ruse. She reached her second quarterfinal in Hua Hin, Thailand. At the Dubai Championships, after receiving a wildcard, she lost in the second round to eighth seed Belinda Bencic in the second longest match of the season, in 3 hours and 27 minutes.[20] She reached her third quarterfinal of the season at the inaugural ATX Open in Austin, Texas defeating Dalma Gálfi and Madison Brengle.[21] Next, she defeated Anna-Lena Friedsam to reach the semifinals and forth seed American, Danielle Collins, to reach her first WTA Tour final.[22] She won her maiden title defeating another first time WTA Tour finalist, Varvara Gracheva.[23] She did not shake her Russian opponent's hand, and dedicated her win "to Ukraine and to all the people who are fighting and dying right now".[24] This win lifted her into the top 40 in the singles rankings.[25]

At the Miami Open, Kostyuk won her first-round match against Elisabetta Cocciaretto but was defeated by Anastasia Potapova in the second, and once again refused to shake her opponent's hand.[26]

Despite a first-round loss at the French Open, she reached No. 35 in the rankings.

At Wimbledon, she finished again in the second round for a third consecutive year, defeating world No. 8, Maria Sakkari, for her first top-ten win.

Current through the 2023 Canadian Open.

Current through the 2023 Wimbledon Championships.

The tournaments won by Kostyuk are in boldface, and advanced into finals by Kostyuk are in italics.

• She has a 3–15 (17%) record against players who were, at the time the match was played, ranked in the top 10.

Result	W–L	Opponent	Rank	Event	Surface	Rd	Score	Rank	H2H
2018
Loss	0–1	Elina Svitolina	No. 4	Australian Open, Australia	Hard	3R	2–6, 2–6	No. 521
Loss	0–2	Caroline Garcia	No. 7	Stuttgart Open, Germany	Clay (i)	2R	1–6, 6–3, 5–7	No. 158
2020
Loss	0–3	Naomi Osaka	No. 9	US Open, United States	Hard	3R	3–6, 7–6(7–4), 2–6	No. 137
2021
Loss	0–4	Iga Świątek	No. 9	French Open, France	Clay	4R	3–6, 4–6	No. 81
2022
Loss	0–5	Paula Badosa	No. 6	Australian Open, Australia	Hard	3R	2–6, 7–5, 4–6	No. 66
Loss	0–6	Aryna Sabalenka	No. 2	Dubai Championships, UAE	Hard	1R	4–6, 1–6	No. 49
Loss	0–7	Karolína Plíšková	No. 8	Internationaux de Strasbourg, France	Clay	1R	4–6, 2–6	No. 59
Loss	0–8	Jessica Pegula	No. 8	Cincinnati Open, United States	Hard	2R	7–6(7–5), 1–6, 2–6	No. 74
Loss	0–9	Maria Sakkari	No. 6	Guadalajara Open, Mexico	Hard	2R	4–6, 4–6	No. 58
2023
Loss	0–10	Ons Jabeur	No. 2	Adelaide International, Australia	Hard	QF	6–7(5–7), 5–7	No. 69
Loss	0–11	Jessica Pegula	No. 3	Australian Open, Australia	Hard	3R	0–6, 2–6	No. 61
Loss	0–12	Belinda Bencic	No. 9	Abu Dhabi Open, UAE	Hard	2R	4–6, 5–7	No. 57
Loss	0–13	Belinda Bencic	No. 9	Dubai Championships, UAE	Hard	2R	7–6(9–7), 6–7(5–7), 4–6	No. 55
Loss	0–14	Aryna Sabalenka	No. 2	French Open, France	Clay	1R	3–6, 2–6	No. 39
Win	1–14	Maria Sakkari	No. 8	Wimbledon Championships, United Kingdom	Grass	1R	0–6, 7–5, 6–2	No. 36
Win	2–14	Caroline Garcia	No. 6	Washington Open, United States	Hard	2R	6–2, 6–3	No. 34
Loss	2–15	Elena Rybakina	No. 4	US Open, United States	Hard	1R	2–6, 1–6	No. 39
Win	3–15	Ons Jabeur	No. 7	China Open, China	Hard	2R	7–6(7–5), 6–1	No. 44