Katherine Hui

Katherine Hui (born 29 January 2005) is an American tennis player. She became the girls' singles champion at the 2023 US Open.^[1][2]

Katherine Hui

Hui at the 2023 US Open
Country (sports)	United States
Born	(2005-01-29) 29 January 2005 (age 20) San Diego, California
Prize money	$46,465
Singles
Career record	30–32
Career titles	0
Highest ranking	No. 855 (20 November 2023)
Grand Slam singles results
US Open	Q1 (2023)
Doubles
Career record	17–21
Career titles	0
Highest ranking	No. 597 (17 July 2023)
Last updated on: 4 November 2024.

Early and personal life

From San Diego, California, Hui graduated from Santa Fe Christian High School in 2023 and committed to Stanford University.^[3] Her parents, Yimei and Yan, were born in China before moving to the United States.^[4]

Juniors

Hui qualified for the prestigious junior tournament Les Petits As in Tarbes in January 2019.^[5] At the tournament, she lost to eventual champion Linda Fruhvirtová in the quarterfinals.^[6] Hui and her partner, Kayla Cross from Canada, were the runners-up in doubles.^{[citation needed]}

In 2022, at the Billie Jean King Girls’ 16s and 18s National Championships, Hui reached the semifinals.^[7] 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.^[8]

Awarded a wildcard into the girls' singles at the 2023 US Open, Hui won the tournament by defeating Tereza Valentová in straight sets. She did not lose a set throughout the tournament.^[9]

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.^[10]

She received a wildcard for the 2024 San Diego Open for her WTA Tour main-draw debut,^[11] but lost in the first round to seventh seed Donna Vekić.^[12]

Junior Grand Slam finals

Singles: 1 (1 title)

Result	Year	Tournament	Surface	Opponent	Score
Win	2023	US Open	Hard	Tereza Valentová	6–4, 6–4