2018–19: First titles, top 100 Gauff made her debut on the
ITF Women's Circuit in May 2018 at the age of 14 as a qualifier in the 25k event at
Osprey, where she won her first professional match. She received a wildcard into qualifying at the
US Open, but lost her opening match five months after turning 14 years old. In her first 2019 tournament, she finished runner-up in doubles at the 100k
Midland Tennis Classic alongside
Ann Li. Two weeks later, Gauff played her next event at the $25k level in
Surprise and reached the finals in both singles and doubles. She finished runner-up in singles and won her first WTA Tour title in doubles alongside
Paige Hourigan. In March, at the
Miami Open, she recorded her first WTA Tour match win against
Caty McNally. Gauff lost the second round of qualifying at the
French Open. At
Wimbledon, she defeated
Aliona Bolsova and
Greet Minnen. Gauff became the youngest player to reach the main draw at Wimbledon by qualifying in the Open Era at the age of 15 years and three months. In her main-draw debut, she upset five-time Wimbledon champion
Venus Williams in straight sets. Gauff won over
Magdaléna Rybáriková and No. 60
Polona Hercog, saving two match points against Hercog. The hype surrounding Gauff's first-round match win led to her third rounder moving to
Centre Court. She was eliminated with a fourth-round loss to eventual champion
Simona Halep. All four of Gauff's matches were most-watched matches on
ESPN on their respective days during the first week of coverage. With this performance, she rose to world No. 141. Gauff played in one
US Open Series tournament at the
Washington Open, where she qualified for the main draw but lost in the first round. She entered the doubles event with McNally and defeated
Fanny Stollár and
Maria Sanchez in the final for their first career WTA title in their first joint WTA. At the
US Open, Gauff wild-carded into the singles and doubles main draws. She continued her success in major singles with two three-set wins over
Anastasia Potapova and
Tímea Babos, both on
Louis Armstrong. She was defeated in the third round by world No. 1 and defending champion,
Naomi Osaka. In doubles, Gauff and McNally won two matches, including an upset over ninth seeds
Nicole Melichar and
Květa Peschke. They lost in the third round to eventual runners-up
Ashleigh Barty and
Victoria Azarenka. Although Gauff lost in qualifying at the
Linz Open, she entered the main draw as a
lucky loser and won the title, notably upsetting top seed
Kiki Bertens in the quarterfinals for her first top-10 victory. She defeated
Jeļena Ostapenko in the final to become the youngest WTA player, at old, to win a singles title since 2004. With this title as well as a semifinal in doubles with McNally, Gauff made her top-100 debuts in both the WTA singles and doubles rankings. Gauff and McNally ended their year with a second WTA doubles title at the
Luxembourg Open over
Kaitlyn Christian and
Alexa Guarachi.
2020: Australian Open fourth round Starting 2020 at the
Auckland Open ranked No. 67 in the world, Gauff defeated
Viktória Kužmová before losing to
Laura Siegemund in the second round. Playing doubles with McNally, Gauff reached the semifinals. At the
Australian Open, Gauff defeated Venus Williams in straight sets in the first round and
Sorana Cîrstea in the second round, making it three straight majors where she reached the third round. She defeated defending champion Osaka in the third, becoming the youngest player to defeat a top-5 player since
Jennifer Capriati beat
Gabriela Sabatini at the
1991 US Open. In the fourth round, she lost to the eventual champion,
Sofia Kenin. In doubles, Gauff and McNally recorded their best result in a major championship to date, reaching the quarterfinals before falling to second seeds and eventual champions,
Kristina Mladenovic and Tímea Babos. Gauff beat two top-50 players at the
Lexington Challenger, before losing in straight sets to world No. 49,
Jennifer Brady. At the Western and Southern Open, played in New York, Gauff lost in the first round to world No. 21,
Maria Sakkari. At the
US Open, Gauff was defeated in the first round by
Anastasija Sevastova. Gauff, ranked 53, beat world No. 34,
Ons Jabeur, in the first round of the
Italian Open before losing to two-time major champion
Garbiñe Muguruza. At the
French Open, Gauff defeated the ninth seed and world No. 13,
Johanna Konta, in the first round, but went on to lose to eventual quarterfinalist
Martina Trevisan in a second-round match in which Gauff hit 19 double faults. At the
Ostrava Open, she qualified for the main draw and was defeated by world No. 12,
Aryna Sabalenka, in the second round.
2021: French Open quarterfinals, top 20 Starting the year ranked No. 48, in the
Abu Dhabi Open, she beat Norwegian
Ulrikke Eikeri before falling in the next round to Maria Sakkari. At the
Australian Open, in singles, Gauff again beat Teichmann in the first round, but fell in the round of 64 to the fifth-seeded
Elina Svitolina, in straight sets. In doubles, she and McNally failed to Demi Schuurs and Nicole Melichar in the quarterfinals. In doubles, she partnered with Canadian
Sharon Fichman, and they bowed out in the first round to
Duan Yingying and
Zheng Saisai. After the
Dubai Championships, she reached a career high of No. 35 in singles. In the
Miami Open, she played her first WTA 1000 event while seeded (as the 31st). In May, Gauff reached the first semifinal at a WTA 1000 in her career at the
Italian Open due to then-No. 1, Barty's retiring with a right arm injury in their quarterfinal match. As a result, she entered top 30 for the first time. She then lost to the eventual champion,
Iga Świątek. Gauff won her second singles and third doubles (with McNally) titles at the
Emilia-Romagna Open in Parma. She became the youngest player to win both the singles and doubles titles at an event since
Maria Sharapova won both titles at the
2004 Birmingham Classic. Gauff thus rose to new career-high rankings of world No. 25 in singles and No. 41 in doubles. She became the youngest American to make her top-25 debut in nearly 23 years (since Serena Williams, June 8, 1998). Seeded 24th at the
French Open (her first time being seeded at a major), she beat
Aleksandra Krunić and
Wang Qiang in straight sets, received a walkover when leading one set to love against 13th seed and Australian Open runner-up
Jennifer Brady, and beat 25th seed
Ons Jabeur in just 53 minutes to reach her first major quarterfinal. As a result, she became the youngest female player (17 years, three months) to reach a major quarterfinal since
Nicole Vaidišová at the 2006 French Open, the youngest American to reach a quarterfinal at the French Open since
Jennifer Capriati in 1993 and the youngest American to reach the quarterfinals of any major tournament since
Venus Williams reached the 1997 US Open final. Subsequently, Gauff was eliminated after losing in straight sets to the eventual champion, unseeded
Barbora Krejčíková. As a result, she reached a new career-high of No. 23. At
Wimbledon, Gauff reached the fourth round for a second consecutive time defeating
Elena Vesnina in straight sets in 70 minutes, and
Kaja Juvan in straight sets in the third round. Gauff lost her next match to
Angelique Kerber in straight sets, eliminating her from the tournament. She also reached the third round in doubles with Caty McNally and as a result entered the top 40 in the doubles rankings at No. 38 on 12 July. At 17 years old, she was selected for the
2020 Summer Olympics in Tokyo, becoming the second youngest American player after Jennifer Capriati competed at 16 in 1992, and the youngest Olympic tennis player of any gender since
Mario Ančić in 2000. However, she tested positive for COVID-19 and was forced to withdraw. At the
Cincinnati Open, Gauff reached the second round and lost to second seed, and world No. 2, Naomi Osaka. At the
US Open, Gauff beat
Magda Linette in the first round, before falling to
Sloane Stephens in the next. In the women's doubles, Gauff and McNally stormed into their first major semifinal without dropping a set and in the finals, they lost to
Sam Stosur and
Zhang Shuai.
2022: French Open final, singles top 5, doubles No. 1 Seeded 18th at the
Australian Open, Gauff lost in the first round against Wang Qiang in straight sets. In February, Gauff reached the quarterfinals at the
Qatar Open by defeating
Shelby Rogers, Caroline Garcia and third seed
Paula Badosa. In the quarterfinals, Gauff lost to sixth seed Maria Sakkari. In
doubles, Gauff paired with
Jessica Pegula to win her first WTA 1000 doubles title, beating third-seeded pair of
Veronika Kudermetova and
Elise Mertens in the final. With the win, she climbed to a career-high No. 10 in the doubles rankings on 28 February 2022. Gauff reached her first major singles final at the
French Open, defeating
Rebecca Marino,
Alison Van Uytvanck, Kaia Kanepi, 31st seed Elise Mertens, Sloane Stephens, and Martina Trevisan, before losing to Iga Świątek in straight sets. She reached the final in doubles with Jessica Pegula where they were defeated by Caroline Garcia and Kristina Mladenovic. As a result, she secured a new career-high of world No. 13 in singles and the top 5 in doubles. After winning her first two matches at
Wimbledon Championships as the 11th seed against unseeded Romanians
Elena-Gabriela Ruse and
Mihaela Buzărnescu, Gauff lost in the third round to 20th seed
Amanda Anisimova, in three sets. As a result, she reached a new career-high ranking of world No. 11 on 11 July 2022. Seeded sixth at the
Silicon Valley Classic, she reached the quarterfinals defeating
Anhelina Kalinina in the first round, and next Naomi Osaka who saved seven match points. In her quarterfinal match, she struggled with her serve and lost in straight sets to Paula Badosa. At the
Canadian Open, she became the youngest player to reach back-to-back quarterfinals in Canada since Jennifer Capriati in 1990 and 1991. She beat sixth seed Aryna Sabalenka, a day after ousting Wimbledon champion
Elena Rybakina, winning both matches in a third-set tiebreak. She lost to eventual champion Simona Halep, in straight sets. Seeded third in doubles at the same tournament she reached the semifinals with Pegula defeating fifth seeds
Desirae Krawczyk and
Demi Schuurs. Next they defeated
Madison Keys/
Sania Mirza in the semifinals and Nicole Melichar/
Ellen Perez in the final to win their second WTA 1000 title together. As a result, Gauff became the No. 1 doubles player in the world. At the
US Open, she reached the quarterfinals of this major for the first time with wins over 20th seed Madison Keys and Zhang Shuai becoming the youngest American woman to achieve this feat since 2009, when
Melanie Oudin was 17. As a result, she guaranteed herself a top 10 debut in the singles rankings at world No. 8 on 12 September 2022, after the tournament. Subsequently, Gauff was defeated by Caroline Garcia, in straight sets. Seeded second in doubles, Gauff and partner Pegula were defeated in the first round by
Leylah Fernandez and
Daria Saville. In October, Gauff became the youngest player in singles since
Maria Sharapova in 2005 to qualify for the year-end
WTA Finals. She and partner Jessica Pegula also both qualified for the doubles championships. Gauff and Pegula were the first Americans since Serena and Venus Williams in 2009 to qualify for both the singles and doubles year-end championships.
2023: US Open singles champion, world No. 3 Gauff started her 2023 season at the
Auckland Open, where she defeated
Rebeka Masarova in the final in straight sets. At the
Australian Open, Gauff advanced to the fourth round, where she lost to Jeļena Ostapenko in straight sets. At the
Qatar Ladies Open, Gauff reached the quarterfinals after defeating two-time champion
Petra Kvitová in the second round. At the same tournament in doubles, Gauff and Jessica Pegula defended their title, defeating
Lyudmyla Kichenok and Jeļena Ostapenko in a three-set match. At
Dubai, Gauff reached the semifinals by defeating Madison Keys in the quarterfinals, before losing to Iga Świątek. At
Indian Wells, Gauff lost in the quarterfinals to second seed and eventual runner-up, Aryna Sabalenka. In
Miami, Gauff lost against 27th seed
Anastasia Potapova in the third round. In doubles at the same tournament, Gauff won her fifth overall and third WTA 1000 team title with her partner Jessica Pegula. They became the first all-American duo to win the Miami Open doubles title in 22 years, defeating Leylah Fernandez and
Taylor Townsend in the final. In August, Gauff won the
Washington Open title, beating Maria Sakkari in the final. It was Gauff's first
WTA 500 singles title, and her biggest singles title to date. She became the first teenager to win the tournament. Gauff won her first
WTA 1000 title at the
2023 Cincinnati Open, defeating world No. 1, Iga Świątek, in the semifinals and world No. 10,
Karolína Muchová, in the final. In September, Gauff won the
US Open, her first major singles title, beating world No. 2, Aryna Sabalenka, in three sets and becoming the first American teenager to win the US Open since Serena Williams in 1999. As a result, she reached world No. 3 in the rankings on 11 September 2023 and was nominated at the
Laureus World Sports Awards for Breakthrough of the Year. Gauff and Pegula returned to the world No. 1 doubles ranking on 23 October 2023, after qualifying for the
2023 WTA Finals as a pair and also individually, becoming the first players to qualify in both disciplines in back-to-back years since
Sara Errani in 2012–13.
2024: WTA Finals singles & Major doubles titles, world No. 2 At the
Italian Open she reached the semifinal for the second time at this tournament and second at the WTA 1000 level for the season defeating Magdalena Fręch, Jaqueline Cristian, Paula Badosa and seventh seed
Zheng Qinwen. With the win, she passed
Caroline Wozniacki for the most WTA 1000 wins before turning 21. She lost to world No. 1 Iga Świątek, in straight sets. At the same tournament, partnering
Erin Routliffe, she reached a consecutive final in doubles. At the
2024 French Open with new partner
Katerina Siniaková, she lifted her first major tournament doubles trophy defeating 11th seeds Sara Errani and
Jasmine Paolini in the final. In singles, also at the French Open, she reached the semifinals and was defeated by eventual champion, Iga Świątek, but despite the loss reached a new career-high ranking of world No. 2 in singles on 10 June 2024. At the
Wimbledon Championships, Gauff went out in the fourth round to
Emma Navarro. Gauff was chosen by her Olympic teammates to be the female flag-bearer for the United States at the opening ceremony of the
2024 Summer Olympics in Paris, alongside
LeBron James. She became the youngest athlete to be so honored. In singles, she lost in the third round to
Donna Vekić in straight sets. In October, Gauff won the 2024
China Open title, beating Karolína Muchová in the final. It was Gauff's second WTA 1000 singles title. She became the first player to win each of her seven WTA hardcourt finals in the
Open era and the second American to win the championship, following
Serena Williams' title runs in 2004 and 2013. On November 9, Gauff became the
2024 WTA Finals singles champion, becoming the youngest player to win the year-end championships since Maria Sharapova in 2004 and the first American to win the finals since Serena Williams in 2014. She beat Iga Świątek, the No. 2 seed and defending champion of the WTA Finals in
Riyadh. She then defeated Sabalenka in the semifinals and Zheng Qinwen in the finals to capture her first year-end singles championship title.
2025: United Cup, French Open and Wuhan titles To begin the
2025 season, Gauff participated in the
United Cup, where the United States team won the title against Poland. In the final, she defeated world No. 2, Iga Świątek, in straight sets. Gauff was undefeated across the tournament. At the
Australian Open, she advanced to the quarterfinals where she was defeated by Paula Badosa, in straight sets. After the Australian Open, Gauff lost both of her opening matches in the Middle East at the
Qatar Open and the
Dubai Championships, totaling three consecutive losses. She then reached the 4th round at both the
Indian Wells Open and the
Miami Open. During the clay season, Gauff began to rediscover her form. She reached the quarterfinals of the
Stuttgart Open, losing to Jasmine Paolini. At the
Madrid Open, she reached her first final at the tournament, losing to world No. 1, Aryna Sabalenka. Next at the
Italian Open, she again reached the final, falling to Jasmine Paolini. At the
French Open, Gauff became the youngest woman to reach the finals of the three biggest clay court tournaments (Madrid Open, Italian Open, and French Open) in the same year. She went on to defeat Aryna Sabalenka in the final to win her first French Open title and her second major title. It was the first French Open singles triumph for an athlete from the United States since Serena Williams in 2015. At
Wimbledon, Gauff lost her first-round match to
Dayana Yastremska, in straight sets. In October, Gauff won the 2025
Wuhan Open title, beating compatriot Jessica Pegula in the final. It was Gauff's third WTA 1000 singles title. She became the first American to win the title since
Venus Williams in 2015 and the first player to win her first nine hardcourt finals.
2026: Miami final Gauff's 2026 season started in Australia at the
United Cup, where she helped the defending US team advance to the semifinals to face Poland. In the semifinals, Gauff defeated Iga Swiatek in straight sets, however,
Team United States eventually fell to Poland 2–1. At the
Australian Open, Gauff advanced to the quarterfinals where she was defeated by
Elina Svitolina in straight sets. Gauff moved on to the
2026 WTA Qatar Open, where she lost her opening round to
Elisabetta Cocciaretto, a Lucky Loser, in straight sets. After that, Gauff entered the
2026 Dubai Open as the third seed. She defeated
Anna Kalinskaya, Elise Mertens, and
Alexandra Eala on her way to the semifinals before falling to Elina Svitolina 6–4, 6–7(13), 6–4 in just over three hours. Gauff then entered
Indian Wells as the fourth seed, where she faced Eala again in the third round, and she was eliminated after retiring due to an arm injury. However, she would go on to play in
Miami, where she won her second round rematch against Cocciaretto in three sets. Gauff then defeated compatriot
Alycia Parks in three sets to advance to the fourth round. Despite dropping the second set, Gauff would defeat
Sorana Cirstea in three sets to reach the quarterfinals for the first time in her career. Next, she defeated 12th seed
Belinda Bencic. In the semifinals, she defeated
Karolina Muchová to reach her first final at her home WTA 1000 event. Despite battling back to take the second set, Coco Gauff would eventually lose the final against Aryna Sabalenka in three sets. ==Rivalries==