Catherine Elizabeth Frances Harrison (born April 9, 1994) is an American tennis player.

She has career-high WTA rankings of 214 in singles, achieved on 12 September 2022, and No. 69 in doubles, reached on 11 July 2022.

Harrison played college tennis at the University of California, Los Angeles (UCLA).^[1]

Harrison made her WTA Tour main-draw debut at the 2011 Cellular South Cup, after receiving a wildcard for the singles competition.^{[citation needed]}

Harrison won her first doubles title at the Monterrey Open, partnering compatriot Sabrina Santamaria and defeating Han Xinyun and Yana Sizikova in the final.^[2]

She made her Grand Slam tournament debut at the French Open in doubles.^{[citation needed]} Harrison qualified to make her singles debut at the Wimbledon,^[3][4] defeating Arantxa Rus in the first round^[5] then losing her next match to Ajla Tomljanovic.^[6] She also qualified for the main draw at the US Open, losing to sixth seed Aryna Sabalenka in the first round.^[7]

Only main-draw results in WTA Tour, Grand Slam tournaments, Billie Jean King Cup and Olympic Games are included in win–loss records.

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Mar 2022	Monterrey Open, Mexico	WTA 250	Hard	Sabrina Santamaria	Han Xinyun Yana Sizikova	1–6, 7–5, [10–6]

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Loss	0–1	Oct 2010	ITF Amelia Island, United States	W10	Clay	Lauren Herring	2–6, 3–6
Loss	0–2	Nov 2018	ITF Lawrence, United States	W25	Hard	Caty McNally	2–6, 2–6
Win	1–2	Aug 2019	ITF Fort Worth, United States	W25	Hard	Chanelle Van Nguyen	6–4, 6–0
Win	2–2	Oct 2021	ITF Redding, United States	W25	Hard	Dalila Jakupović	6–1, 6–1
Win	3–2	Mar 2024	ITF Brossard, Canada	W15	Hard (i)	Jessie Aney	4–6, 6–1, 6–3
Win	4–2	Mar 2024	Kōfu International Open, Japan	W50	Hard	Lee Ya-hsuan	6–7(8), 6–1, 6–1
Loss	4–3	Jun 2024	ITF Santo Domingo, Dominican Rep.	W35	Hard	Victoria Hu	4–6, 7–6(6), 4–6

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1	Jul 2014	ITF Evansville, United States	W10	Hard	Mary Weatherholt	Brooke Austin Natalie Pluskota	4–6, 6–3, [9–11]
Win	1–1	Jul 2014	ITF Austin, US	W10	Hard	Mary Weatherholt	Alexandra Cercone Alexa Guarachi	6–2, 7–5
Loss	1–2	Aug 2014	ITF Fort Worth, US	W10	Hard	Mary Weatherholt	Hayley Carter Stefanie Tan	3–6, 3–6
Win	2–2	Jul 2016	ITF Austin, US	W10	Hard	Lorraine Guillermo	Madison Harrison Stephanie Nauta	6–3, 6–3
Win	3–2	Sep 2016	ITF Lubbock, US	W25	Hard	Emina Bektas	Ema Burgić Bucko Renata Zarazúa	6–3, 6–4
Win	4–2	Nov 2016	ITF Nashville, US	W25	Hard	Madeleine Kobelt	Melissa Kopinski Felicity Maltby	6–3, 6–0
Win	5–2	Mar 2018	ITF Antalya, Turkey	W15	Clay	Sarah Lee	Amina Anshba Melis Sezer	6–4, 6–3
Loss	5–3	May 2019	ITF Singapore	W25	Hard	Emily Appleton	Paige Hourigan Aldila Sutjiadi	1–6, 6–7(5)
Loss	5–4	Sep 2019	ITF Redding, US	W25	Hard	Paige Hourigan	Emina Bektas Tara Moore	3–6, 1–6
Win	6–4	Feb 2020	Kentucky Open, US	W100	Hard (i)	Quinn Gleason	Whitney Osuigwe Hailey Baptiste	7–5, 6–2
Win	7–4	May 2021	ITF Naples, US	W25	Clay	Ulrikke Eikeri	Erina Hayashi Kanako Morisaki	6–2, 3–6, [10–2]
Win	8–4	Jun 2021	ITF Sumter, US	W25	Hard	Emina Bektas	Paige Hourigan Aldila Sutjiadi	7–5, 6–4
Win	9–4	Oct 2021	Tennis Classic of Macon, United States	W80	Hard	Quinn Gleason	Alycia Parks Alana Smith	6–2, 6–2
Loss	9–5	Jan 2022	Traralgon International, Australia	W60+H	Hard	Aldila Sutjiadi	Emina Bektas Tara Moore	6–0, 6–7(1), [8–10]
Loss	9–6	Feb 2022	ITF Birmingham, UK	W25	Hard (i)	Quinn Gleason	Andrė Lukošiūtė Eliz Maloney	6–7(4), 6–3, [8–10]
Win	10–6	Feb 2022	GB Pro-Series Glasgow, UK	W25	Hard (i)	Quinn Gleason	Justina Mikulskytė Valeria Savinykh	6–4, 6–1
Win	11–6	Apr 2022	ITF Orlando, US	W25	Clay	Maegan Manasse	Hsieh Yu-chieh Hsu Chieh-yu	6–1, 6–0
Loss	11–7	Jun 2022	Surbiton Trophy, UK	W100	Grass	Fernanda Contreras	Ingrid Neel Rosalie van der Hoek	3–6, 3–6
Loss	11–8	Oct 2022	Saguenay Challenger, Canada	W60	Hard (i)	Yanina Wickmayer	Arianne Hartono Olivia Tjandramulia	7–5, 6–7(3), [8–10]
Win	12–8	Nov 2022	Calgary Challenger, Canada	W60	Hard (i)	Sabrina Santamaria	Kayla Cross Marina Stakusic	7–6(2), 6–4
Win	13–8	May 2024	ITF Lopota, Georgia	W50	Hard	Elysia Bolton	Anastasia Zolotareva Rada Zolotareva	6–4, 6–2

Result	W–L	Opponent	Rank	Event	Surface	Round	Score	Rank	H2H
2022
Loss	0–1	Aryna Sabalenka	No. 6	US Open, United States	Hard	1R	1–6, 3–6	No. 243	0–1

• Catherine Harrison at the Women's Tennis Association
• Catherine Harrison at the International Tennis Federation
• Catherine Harrison at ESPN.com