Claire Liu

Grand Slam results - Singles:

• Australian Open: –
• French Open: F (2017)
• Wimbledon: W (2017)
• US Open: 2R (2013, 2016)

Grand Slam results - Doubles:

• Australian Open: –
• French Open: QF (2017)
• Wimbledon: W (2016)
• US Open: QF (2016)

Liu won the Wimbledon junior doubles tournament in 2016 with fellow American Usue Maitane Arconada, defeating Mariam Bolkvadze and Caty McNally in the final, in straight sets. The following year, after losing the French Open junior final to Whitney Osuigwe, she came back to win the Wimbledon singles title against Ann Li, making her the first American girl to win the event since Chanda Rubin in 1992. With this Grand Slam success, Liu rose to world No. 1 in the girls' junior rankings.

She won her first professional title in March 2015, at an Orlando clay-court tournament on the ITF Women's Circuit. At age 14, Liu was the youngest tennis player to win a professional tournament since Anna Kournikova in 1996.

On her debut at the US Open, Liu was granted a wildcard into the qualifying tournament. She beat Verónica Cepede Royg and ninth seed Jana Čepelová in her first two matches, before losing to the 26th seed, Alexandra Panova, in the final round. Liu, alongside Taylor Fritz, was also given a wildcard for the mixed-doubles draw; they were defeated in the first round by the fourth seeds and eventual champions, Martina Hingis and Leander Paes.^[]

After securing two ITF tournament wins in 2017, Liu was granted again a wildcard into the qualifying for the US Open. She defeated all three of her opponents in the qualifying tournament, earning her a spot in the singles main draw of a Grand Slam championship for the first time. There, she was defeated in the first round, in straight sets by Duan Yingying.^[]

In their doubles main-draw debut at a major, Liu and Taylor Johnson lost in the first round of the US Open.

At the 2018 Wimbledon Championships, Liu advanced to the main draw by winning all of her qualifying matches. She lost in the second round to the eventual champion Angelique Kerber. Liu was the only player in the tournament to win a set against Kerber.

In October 2019, Liu won her fourth title on the ITF Circuit at a $25k tournament in Florence, South Carolina. After finishing as a runner-up in two tournaments in 2020 and another two in 2021, Liu won consecutive tournaments in May 2021 at the $60k event in Charlottesville, Virginia and the $100k Charleston Pro Tennis. As a result, she entered the top 100 on 23 August 2021.^[]

In May, Liu reached her maiden WTA Tour final in Rabat, losing to Martina Trevisan who was also a first-time tour finalist. As a result, she reached the top 75 on 23 May 2022.^[]

She made it through to the semifinals at the Jasmin Open in Monastir, Tunisia, defeating seventh seed Kateřina Siniaková in the second round and top seed Ons Jabeur in the quarterfinals for her first win over a top-10 ranked player. Her run was ended in the last four by fifth seed and eventual champion Elise Mertens.

At the Australian Open, Liu overcame Madison Brengle to reach the second round where she lost to 12th seed Belinda Bencic.

She reached the third round of a WTA 1000 for the first time at the 2 Miami Open defeating Kateřina Siniaková by retirement and lucky loser Julia Grabher before she lost to 25th seed Martina Trevisan.

At the Italian Open, Liu got the better of wildcard Camilla Rosatello in a first round match that went to three sets, before losing to 32nd seed Marta Kostyuk. She reached the second round at the French Open thanks to a win over qualifier Ylena In-Albon, but lost to top seed and eventual champion Iga Świątek.

Liu defeated alternate Oana Gavrilă and Irina Khromacheva at the Swedish Open to set up a quarterfinal meeting with Louisa Chirico which she lost in three sets. The following week at the Hungarian Open, gained revenge by defeating Louisa Chirico in the first round, before recording wims over fourth seed Yulia Putintseva and eighth seed Anna Karolína Schmiedlová to reach the semifinals where she lost to Kateryna Baindl.

Wins over Irina Fetecău, Storm Hunter, sixth seed Rebeka Masarova and Cristina Bucșa, saw Liu make it through to the final at the Chicago Challenger where she lost to Viktoriya Tomova.

She reached the quarterfinals at the Korea Open, defeating qualifier Ku Yeon-woo and seventh seed Arantxa Rus. She lost in the last eight to top seed and eventual champion Jessica Pegula.

Liu qualified for the Miami Open and defeated Petra Martić, before losing to 10th seed Daria Kasatkina by retiring.

She also qualified for the Charleston Open but lost her main-draw match to wildcard Shelby Rogers.

In May 2024, Liu won the ITF tournament in Saint-Gaudens, France, defeating Séléna Janicijevic in the final. Later that month she lost in the first round of qualifying for the French Open to Veronika Erjavec in three sets.