Tsao Chia-yi (, born 2 December 2003) is a Taiwanese tennis player. She has a career-high doubles ranking by the WTA of 115, achieved on 12 August 2024.
Tsao has won one doubles title on the WTA Tour and one on the WTA Challenger Tour. She has also won sixteen doubles titles on the ITF Circuit. In October 2023, she achieved her career-high singles ranking of world No. 464.
Career Tsao made her WTA Tour main-draw debut at the 2023 Hong Kong Open in doubles and won the title with Tang Qianhui.
Partnering Hsieh Su-wei, she reached the quarterfinals at the 2024 Paris Olympics, defeating Romanian duo Irina-Camelia Begu and Monica Niculescu and Ukrainians Marta Kostyuk and Dayana Yastremska. They lost to Czech pairing Karolína Muchová and Linda Nosková.
2025: One year ban from competition Tsao accepted a ban from professional tennis for 12 months, starting from March 2025, after she unintentionally took a cold medicine containing the banned stimulant Methylephedrine, without having a valid therapeutic use exemption.
WTA Tour finals
Doubles: 1 (title) LegendWTA 500WTA 250 (1–0)
ResultDateTournamentTierSurfacePartnerOpponentsScoreWin Oct 2023 Hong Kong Open, China SAR WTA 250 Hard Tang Qianhui Oksana Kalashnikova Aliaksandra Sasnovich 7–5, 1–6, [11–9]
WTA 125 finals Doubles: 1 (title) ResultW–LDateTournamentSurfacePartnerOpponentsScoreWin1–0Båstad Open, SwedenClay Peangtarn Plipuech María Lourdes Carlé Julia Riera7–5, 6–3
ITF Circuit finals Singles: 2 (runner-ups) LegendW15 tournaments (0–2) ResultW–LDateTournamentTierSurfaceOpponentScoreLoss 0–1 Oct 2022ITF Monastir, TunisiaW15 Hard Kristina Paskauskas 2–6, 6–4, 6–7(8)Loss 0–2 Nov 2022ITF Monastir, TunisiaW15 Hard Hanne Vandewinkel 2–6, 5–7
Doubles: 22 (16 titles, 6 runner-ups) LegendW100 tournaments (0–1)W50 tournaments (1–1)W25/35 tournaments (4–2)W15 tournaments (11–2) ResultNo.DateTournamentTierSurfacePartnerOpponentsScoreWin 1–0 May 2022ITF Cancún, MexicoW15 Hard Saki Imamura Melissa Morales Kirsten-Andrea Weedon 6–3, 6–1Win 2–0 Sep 2022ITF Monastir, TunisiaW15 Hard Lee Ya-hsin Emilia Durska Camilla Zanolini 7–6(6), 6–4Win 3–0 Sep 2022ITF Monastir, TunisiaW15 Hard Lee Ya-hsin Abigail Amos Jaeda Daniel 6–0, 6–1Win 4–0 Oct 2022ITF Monastir, TunisiaW15 Hard Lee Ya-hsin Priska Madelyn Nugroho Wei Sijia 1–6, 6–1, [10–3]Win 5–0 Oct 2022ITF Monastir, TunisiaW15 Hard Lee Ya-hsin Flavie Brugnone Stéphanie Visscher 6–4, 6–0Win 6–0 Oct 2022ITF Monastir, TunisiaW15 Hard Lee Ya-hsin Hanne Vandewinkel Radka Zelníčková 6–2, 6–4Win 7–0 Nov 2022ITF Monastir, TunisiaW15 Hard Wu Fang-hsien Kamilla Bartone Bojana Marinković 6–0, 7–5Win 8–0 Nov 2022ITF Monastir, TunisiaW15 Hard Wu Fang-hsien Anastasiia Gureva Vlada Mincheva 6–3, 6–4Win 9–0 Dec 2022ITF Monastir, TunisiaW15 Hard Wu Fang-hsien Oana Gavrilă Emilie Lindh 6–4, 6–3Loss 9–1 Jan 2023ITF Monastir, TunisiaW25 Hard Miho Kuramochi Oana Gavrilă Sapfo Sakellaridi 5–7, 6–4, [6–10]Loss 9–2 Jan 2023ITF Monastir, TunisiaW15 Hard Nadine Keller Lee Ya-hsin Yang Yidi 6–2, 3–6, [13–15]Win 10–2 Mar 2023ITF Hinode, JapanW15 Hard Akari Inoue Li Yu-yun Rinon Okuwaki 6–4, 6–7(5), [10–5]Win 11–2 Jun 2023ITF Tainan, TaiwanW25 Clay Yang Ya-yi Monique Barry Lee Ya-hsin 6–2, 6–2Win 12–2 Sep 2023ITF Kyoto, JapanW25 Hard Aoi Ito Hiromi Abe Anri Nagata 6–2, 6–1Loss 12–3 Jan 2024ITF Nonthaburi, Thailand W50 Hard Lanlana Tararudee Zhibek Kulambayeva Sapfo Sakellaridi w/oWin 13–3 Mar 2024ITF Solarino, ItalyW35 Carpet Martyna Kubka Katarina Kozarov Veronika Miroshnichenko 6–4, 6–2Win 14–3 Apr 2024ITF Kashiwa, JapanW50 Hard Ankita Raina Madeleine Brooks Eudice Chong 6–4, 6–4Loss 14–4 Nov 2024Takasaki Open, JapanW100 Hard Liang En-shuo Momoko Kobori Ayano Shimizu 6–4, 4–6, [3–10]Loss 14–5 Apr 2026ITF SingaporeW15 Hard (i) Erika Sema Rinko Matsuda Marie Weckerle 6–7(6), 2–6Loss 14–6 Apr 2026ITF SingaporeW15 Hard (i) Erika Sema Lin Fang-an Shin Ji-ho 6–7(1), 7–5, [5–10] Win 15–6 Jun 2026ITF Taipei, TaiwanW35 Hard Back Da-yeon Natsumi Kawaguchi Ayano Shimizu 7–5, 6–1Win 16–6 Jun 2026ITF Taipei, TaiwanW35 Hard Lee Ya-hsin Funa Kozaki Mao Mushika 6–0, 6–4
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