Katie Charlotte Boulter (born 1 August 1996) is a British professional tennis player. She has a career-high singles ranking of No. 23 by the WTA, achieved in November 2024, and a best in doubles of No. 225, reached in June 2026. Boulter has won four singles titles on the WTA Tour. She has also won one WTA 125 singles title, as well as seven singles and four doubles titles on the ITF Women's Circuit. She is the current British No. 1 in women's singles.
Boulter was ranked the No. 10 junior tennis player in the world in March 2014. She is based at the Lawn Tennis Association's National Tennis Centre in Roehampton and was coached by Jeremy Bates, Nigel Sears, Timothy Seals, and Mark Taylor.
Early life Boulter was born in Woodhouse Eaves, Leicestershire.
Boulter started playing tennis aged 5, and went on to represent Great Britain three years later, aged 8. She has said that when she was younger, beating her older brother was a motivating factor. "We used to practise together at this local court down the road from our house. It was the only thing I could eventually beat him in, so that felt great."
Boulter played the piano before her tennis career began to take precedence. She also has an interest in fashion and made an appearance in Vogue magazine in 2018.
Career 2008–2013: Steady rise
Following in the path of Anna Kournikova, Boulter showed promise in 2008 when she won the Lemon Bowl in Rome, aged 11. She went on in 2011, aged 14, to become a finalist in the Junior Orange Bowl Tennis Championships in Coral Gables, Florida. Past finalists have included Andy Murray and Caroline Wozniacki. She was awarded the Aegon Junior Player Award that month.
Boulter claimed her first senior doubles title at a $10k event in Sharm El Sheikh in November 2013.
2014: Doubles success, first pro singles title In January 2014, Boulter went on to have further doubles success and was a finalist at the Australian Open girls' doubles event with Ivana Jorović. In May 2014, in Sharm El Sheikh, Boulter won her first senior singles title over fellow Briton Eden Silva. She also won the doubles title at the same event partnering Nina Stojanović, to whom she had lost a previous final in singles. A month later, Boulter was given a wildcard for Wimbledon qualifying, losing in the first round to Italian Alberta Brianti in a three-set match which lasted two-and-a-half hours.
2018: WTA Tour quarterfinal
Boulter won her first $25k singles title at the event in Óbidos, Portugal in April. In May, she won a further singles title at the $60k event in Fukuoka, Japan. She received a wildcard for the Nottingham Open, going on to reach her first WTA Tour quarterfinal with a run which included a win over former US Open champion Samantha Stosur. In July, Boulter received a wildcard into the $100k grass-court event in Southsea, England, where she reached the final and fell to Kirsten Flipkens.
She then received a wildcard into the Wimbledon main draw, where she won her first-round match over Verónica Cepede Royg. She lost in the second round to Naomi Osaka in straight sets.
2019: Australian Open first win Boulter began the 2019 season in Hobart, Tasmania where she did not qualify, losing to Greet Minnen in three sets. Her next tournament was the Australian Open. She defeated Ekaterina Makarova, in three sets, with the first instance in the Australian Open of a third-set tiebreak, winning the tiebreak 10–6. However, her run ended in the second round with a straight-sets defeat by Aryna Sabalenka.
Her next tournament was the St. Petersburg Ladies' Trophy where she entered the main draw as a lucky loser and was defeated by Ekaterina Alexandrova in three sets. At the Mexican Open, she defeated Conny Perrin in the first round, before retiring with an injury during her next match against fifth seed Sofia Kenin.
In April, Boulter suffered a spinal stress fracture while playing for Great Britain in the Fed Cup.
2021: Another Wimbledon win
At the 2021 Australian Open, she suffered a first-round loss against Daria Kasatkina. At Wimbledon, she beat qualifier Danielle Lao, before losing to second seed Aryna Sabalenka, in three sets, in the second round. She qualified for the main draw at the 2021 US Open, but lost in the first round to Liudmila Samsonova.
2022: First top-10 wins and major third round Having won an ITF tournament in February, Boulter had to retire from the WTA Tour event in Lyon in March due to a leg injury.
Boulter missed the clay-court season, but returned at the Nottingham Open in June where she came through qualifying to defeat Tatjana Maria in the first round, before losing to Ajla Tomljanović. Granted a wildcard for the Birmingham Classic, she defeated Alison Riske (her first win against a top-40 ranked player) and Caroline Garcia, before losing to Simona Halep. At Eastbourne, she was also handed a wildcard and defeated fourth seed and world No. 7, Karolina Plíšková, for her first top-10 win. She lost her last 16 match against Petra Kvitová in three sets.
At Wimbledon, Boulter again upset Plíšková in three sets to advance to the third round of a major for the first time in her career. In round three, Boulter lost to Harmony Tan, in straight sets.
2023: British No. 1, first WTA Tour title, top 50
Boulter became the British player No. 1 on 12 June 2023, following a semifinal showing at the Surbiton Trophy. She reached the quarterfinals at the Nottingham Open as one of four British players for a historic first at a WTA Tour event. She went one step further to reach her first WTA Tour semifinal with a win over compatriot Harriet Dart. She defeated another Briton, Heather Watson, to set up an all-British final with Jodie Burrage, the first since 1977. Boulter won the final in straight sets to claim her first WTA Tour title. As a result, she returned to the top 100 in the rankings at No. 77 on 19 June 2023.
She received a special exempt entry into the next UK tournament in Birmingham, but lost in the first round to Zhu Lin in straight sets.
At Wimbledon, she defeated Australian Daria Saville in the first round and Bulgarian Viktoriya Tomova in the second, before losing to Elena Rybakina in an under-one-hour match. With Alex de Minaur in mixed doubles, she also went out in the second round.
Boulter came through two rounds of qualifying to gain a place in the main draw of the Canadian Open in Montreal. She won her first-round match against Rebecca Marino, but lost in round two to Coco Gauff. This result improved Boulter's singles ranking to a career-high ranking of No. 60, on 14 August 2023.
At the US Open, she entered the main draw via her ranking for the first time in her career. In the first round, she defeated Diane Parry in straight sets for her first-ever main-draw win at Flushing Meadows, and then beat Chinese player Wang Yafan, in three sets, in the second round. Boulter lost to Peyton Stearns in round three, in two sets, but reached the top 50 on 11 September 2023.
2024: WTA 500 title & top 25 Boulter was a member of the Great Britain team for the United Cup alongside Cameron Norrie. She defeated Jessica Pegula in the round-robin stage but the team was eliminated before the knock-out phase. She reached the second round of the Australian Open with a win over Yuan Yue but lost to 12th seed and eventual runner-up Zheng Qinwen. Boulter played the Linz Open where she defeated sixth seed Jasmine Paolini, before losing to Anastasia Pavlyuchenkova in the second round.
At the San Diego Open, the unseeded Boulter defeated Lesia Tsurenko, second seed Beatriz Haddad Maia, seventh seed Donna Vekić, and third seed Emma Navarro to reach her first WTA 500 final. In the final, she defeated the sixth seeded Marta Kostyuk achieving her first win at this level and taking her ranking into the top 30.
In April, Boulter helped Great Britain to a 3–1 win in an away tie against team France to make it into the Billie Jean King Cup finals. Having lost to Diane Parry 2–6, 0–6 on day one, Boulter defeated Clara Burel 7–5, 6–0 in the opening match of day two for what was her first Tour-level victory on clay.
Boulter retained her Nottingham Open title in June, defeating Emma Raducanu in the semifinals, and then Karolína Plíšková in the final on the same day at the tournament which was heavily affected by bad weather.
For the first time in her career, Boulter was seeded in the singles at Wimbledon. She defeated Tatjana Maria in two sets, but then lost to fellow Briton Harriet Dart in the second round, 8–10 in the third set tiebreaker.
Boulter lost in the first round of the singles at the Paris Summer Olympics, going down in straight sets to Anna Karolína Schmiedlová. Partnering Heather Watson, she reached the quarterfinals of the doubles, defeating sixth seeded Brazilian duo Beatriz Haddad Maia and Luisa Stefani in the second round, before losing to third seeds and eventual gold medalists Sara Errani and Jasmine Paolini from Italy.
In her first tournament after the Olympics, Boulter reached the third round of the Canadian Open for the first time in her career with wins over Bernarda Pera and 13th seed Beatriz Haddad Maia to set up a meeting with second seed Aryna Sabalenka which she lost.
Seeded 31st, she defeated qualifier Aliaksandra Sasnovich in the first round at the US Open, before losing her next match to Jéssica Bouzas Maneiro. Having received a bye into the second round, and seeded 26th, at the China Open, Boulter defeated Taylor Townsend in straight sets. She lost in the third round to fourth seed Coco Gauff. At the final WTA 1000 event of the season, the Wuhan Open, Boulter lost in the first round to qualifier Lesia Tsurenko.
Boulter defeated Sara Errani in the first round at the Ningbo Open to set up a meeting with sixth seed Beatriz Haddad Maia which she lost in straight sets. Seeded ninth at the Pan Pacific Open, She defeated qualifier Priscilla Hon, lucky loser Kyōka Okamura and Bianca Andreescu to reach the semifinals where she lost to wildcard entrant Sofia Kenin. At the Hong Kong Open, where she was second seed, Boulter defeated Aoi Ito, Wang Xiyu, Anastasia Zakharova and sixth seed Yue Yuan to reach in her third final of the year, which she lost to top seed Diana Shnaider. Despite the defeat, Boulter moved into the world's top-25 for the first time, reaching No. 23 in the WTA rankings.
At the BJK Cup finals in Spain, Boulter defeated Laura Siegemund in straight sets to seal Great Britain's first round win over Germany. She then overcame Leylah Fernandez as Great Britain defeated defending champions Canada to reach the semifinals. In their last four match against Slovakia, Boulter lost to Rebecca Šramková in three sets as Great Britain were defeated 2–1.
2025: First clay-court title, rankings drop At the United Cup, Boulter defeated Nadia Podoroska and then partnered Charles Broom to overcome María Lourdes Carlé and Tomás Martín Etcheverry as Great Britain won their opening group match against Argentina. She then defeated Australia's Olivia Gadecki as Great Britain progressed to the quarterfinals as group winners. They were knocked out of the competition in the last eight by Poland with Boulter losing to Iga Świątek, in three sets.
Seeded 22nd at the Australian Open, Boulter defeated Rebecca Marino but lost to Veronika Kudermetova in the second round.
Boulter was sidelined with a foot injury throughout February, missing the WTA 1000 events in Doha and Dubai. She returned to competitive action in March at Indian Wells where, after being given a bye in the first round, she defeated Irina-Camelia Begu, before losing to seventh seed Elena Rybakina in the third round. At the Miami Open, Boulter was defeated in the first round by Peyton Stearns.