Nikola Bartůňková

Nikola Bartůňková (born 25 February 2006) is a Czech professional tennis player. She has a career-high singles ranking by the WTA of No. 38, achieved on 24 August 2026, and a best doubles ranking of No. 320, reached on 14 August 2023.

Career

2021–24: Tour debut, six months anti-doping ban In April 2021, at the 2021 İstanbul Cup, Bartůňková defeated world No. 152, Leonie Küng, in the first round of qualifying, but lost in the second to Anastasia Gasanova.

She made her WTA Tour debut at the same tournament one year later, after being handed a wildcard entry into the main draw, losing to Anastasia Potapova.

On 16 October 2023, Bartůňková won her first tour-level match when she defeated Dayana Yastremska in the first round of the 2023 Transylvania Open, before losing in three hours to Ana Bogdan in the second round.

In November 2024, Bartůňková was issued with a six-month competition ban backdated to April 2024 for an anti-doping rule violation after testing positive for unintentional use of trimetazidine (TMZ) at two events in early 2024. She had been provisionally suspended from May 2024 until the conclusion of the investigation. The International Tennis Integrity Agency (ITIA) accepted that the source of the TMZ was a contaminated supplement for which she bore "no significant fault or negligence" for having ingested.

2025: WTA 500 semifinal & 125 final In January, Bartůňková played first matches after end of her hiatus in Oslo, reaching semifinal at W15 event where she lost to Anouck Vrancken Peeters. At her second event at the W35 in Sunderland, she claimed her fourth career title. Bartůňková reached another final just a week after the W35 event in Glasgow. In July, she qualified for the Ladies Open Hechingen and beat two former top-100 players, María Lourdes Carlé and Julia Grabher, en route to her first W75 title. In September, Bartůňková was awarded a wildcard into Guadalajara 125 Open, where she lost to eventual finalist Panna Udvardy in the second round. The following week, she received another wildcard entry, this time at the WTA 500 Guadalajara Open, and scored her second and third WTA Tour main-draw wins over Nicole Fossa Huergo and fellow Czech player Darja Viďmanová in straight sets to reach her maiden tour quarterfinal, where she overcame defending champion Magdalena Fręch. Her run was ended in the semifinals by eventual champion, Iva Jovic, in three sets. As a result, she moved up more than 80 places in the rankings to enter the top 200 for the first time at world No. 144, on 15 September 2025.

In October, Bartůňková reached her first WTA 125 final at the Samsun Open but lost to second seed Kaja Juvan. Bartůňková received a wildcard to the WTA 500 Pan Pacific Open in Tokyo but lost to local wildcard Wakana Sonobe. The following week, she lost in the opening round in Chennai, after losing to eventual finalist Kimberly Birrell, in three sets.

In November, Bartůňková received her first nomination for the national team in the 2025 Billie Jean King Cup and helped her team to win Group D. The Czech teenager defeated Yuliana Lizarazo from Colombia, but lost to Petra Marčinko from Croatia.

2026: Major, WTA 1000 debuts & first top 10 win, top 50 In January, Bartůňková entered her first major qualifying at the 2026 Australian Open as the 16th seed. She then scored three wins to make her main-draw debut, where she defeated former top-10 player Daria Kasatkina for her first major match win. Bartůňková reached the third round with an upset over Belinda Bencic, marking her first top-10 win. Her run was ended in the third round by 21st seed Elise Mertens. Following making the final round of qualifying of the Miami Open, Bartůňková entered the top 100 in the singles rankings at No. 95 on 30 March 2026, becoming the fourth 2006-born player to achieve the feat (after Victoria Mboko, Maya Joint and Sara Bejlek).

Bartůňková made her WTA 1000 debut at the 2026 Italian Open as a lucky loser, entering the main draw directly in the second round, replacing tenth seed Victoria Mboko. She recorded her first win at the 1000-level over wildcard Tyra Grant. She reached the last 16 of a WTA 1000 for the first time by upsetting 17th seed Madison Keys. Bartůňková reached her first WTA 125 final on grass at the Birmingham Open, where she lost to top seed Alexandra Eala, in three sets.

Performance timelines

Only main-draw results in WTA Tour, Grand Slam tournaments, Billie Jean King Cup, United Cup, Hopman Cup and Olympic Games are included in win–loss records.

Singles Current through the 2026 Monterrey Open.

Doubles Current through the 2026 Prague Open.

WTA 125 finals

Singles: 2 (2 runner-ups)

ITF Circuit finals

Singles: 11 (6 titles, 5 runner-ups) LegendW60/75 tournaments (1–1)W50 tournaments (0–1)W25/35 tournaments (5–3)Finals by surfaceHard (1–3)Clay (5–2)

Junior finals

Grand Slam tournaments

Singles: 1 (runner-up)

Doubles: 1 (runner-up)

ITF Junior Circuit

Singles: 10 (6 titles, 4 runner-ups) LegendJ500 (0–1)J300 (1–1)J200 (3–0)J100 (0–2)J60 (2–0)

Doubles: 6 (5 titles, 1 runner-up) LegendJ300 (1–1)J200 (4–0)

Wins against top 10 players Bartůňková has a record against players who were, at the time the match was played, ranked in the top 10.