Katherine Hui (born 29 January 2005) is an American tennis player. She became the girls' singles champion at the 2023 US Open.

Early and personal life

From

San Diego San Diego ( , ) is a city on the Pacific coast of Southern California, adjacent to the Mexico–United States border. With a population of over 1.4 million, it is the List of United States cities by population, eighth-most populous city in t ...

, California, Hui graduated from Santa Fe Christian High School in 2023 and committed to

Stanford University Leland Stanford Junior University, commonly referred to as Stanford University, is a Private university, private research university in Stanford, California, United States. It was founded in 1885 by railroad magnate Leland Stanford (the eighth ...

. Her parents, Yimei and Yan, were born in China before moving to the United States.

Juniors

Hui qualified for the prestigious junior tournament

Les Petits As Les Petits As – Le Mondial Lacoste (English: ''Little champions – The Lacoste world championship'') is a junior tennis tournament for players aged 12–14, held in Tarbes, France. This tournament is one of the five Super Category tournaments in ...

Tarbes Tarbes (; Gascon language, Gascon: ''Tarba'') is a Communes of France, commune in the Hautes-Pyrénées Departments of France, department in the Occitania (administrative region), Occitanie Regions of France, region of southwestern France. It is ...

in January 2019. At the tournament, she lost to eventual champion

Linda Fruhvirtová Linda Fruhvirtová (; born 1 May 2005) is a Czech professional tennis player. On 26 June 2023, she reached a career-high singles WTA rankings, ranking of world No. 49. She peaked at No. 187 in the doubles rankings in October 2023. She made ...

in the quarterfinals. Hui and her partner, Kayla Cross from Canada, were the runners-up in doubles. In 2022, at the Billie Jean King Girls’ 16s and 18s National Championships, Hui reached the semifinals. In 2023, at the Billie Jean King Girls’ 16s and 18s National Championships, she reached the final but was defeated in three sets by

Clervie Ngounoue Clervie Ngounoue (born 19 July 2006) is an American tennis player. She has a career-high singles ranking of world No. 241 by the WTA, achieved on 31 March 2025 and a doubles ranking of No. 187, achieved on 17 August 2024. Early life Ngounoue wa ...

. Awarded a wildcard into the girls' singles at the 2023 US Open, Hui won the tournament by defeating

Tereza Valentová Tereza Valentová (born 20 February 2007) is a Czech professional tennis player. She has career-high WTA rankings of No. 182 in singles and No. 241 in doubles. She has a career-high combined junior ranking of No. 4, achieved on 10 June 2024, ...

in straight sets. She did not lose a set throughout the tournament.

Professional career

Awarded a wildcard for the qualifying competition to the 2023 US Open women's singles, Hui lost in the first round to

Eugenie Bouchard Eugenie "Genie" Bouchard (; , ; born February 25, 1994) is a Canadian professional tennis and pickleball player. At the 2014 Wimbledon Championships – Women's singles, 2014 Wimbledon Championships, she became the first Canadian-born player repr ...

. She received a wildcard for the 2024 San Diego Open for her

WTA Tour The WTA Tour (also known as the Hologic WTA Tour for sponsorship reasons) is a worldwide top-tier tennis tour for women and organized by the Women's Tennis Association. The second-tier tour is the WTA 125 series, and third-tier is the ITF Wome ...

main-draw debut, but lost in the first round to seventh seed

Donna Vekić Donna Vekić (; born 28 June 1996) is a Croatian professional tennis player. She achieved a career-high singles WTA rankings, ranking of world No. 17 on 27 January 2025. Her best performance at a Grand Slam (tennis)#Tournaments, major is reachin ...

Junior Grand Slam finals

Singles: 1 (1 title)

References

{{DEFAULTSORT:Hui, Katherine American female tennis players Tennis players from San Diego 2005 births Living people US Open (tennis) junior champions American sportswomen of Chinese descent American tennis players of Chinese descent 21st-century American sportswomen