Hsu Yu-hsiou

Hsu Yu-hsiou (; born 2 April 1999) is a Taiwanese tennis player. He has a career high ATP singles ranking of world No. 158 achieved on 16 October 2023 and a career high ATP doubles ranking of world No. 145 achieved on 17 November 2025. Hsu is currently the No. 1 Taiwanese tennis player.

Junior career As a junior, Hsu achieved a career-high total combined ranking of No. 5, reached on 12 June 2017. In 2017, he won the 2017 Australian Open boys' doubles championships title alongside Zhao Lingxi. He then won the 2017 Wimbledon boys' doubles championships title with Axel Geller and impressively also the 2017 US Open boys' doubles championships title with Wu Yibing, holding three out of the four junior grand slam doubles championships simultaneously.

Professional career 2018: First ITF titles and ATP Challenger final In March 2018, he won his first singles and doubles titles on the ITF Men's Circuit. In the same year, he made his debut for the Chinese Taipei Davis Cup team, where he won his single's tie against Shahin Khaledan of Iran by a score of 4–6, 6–1, [10–8]. This would mark his first appearance as well as his first win at the ATP Tour level.

In September, Hsu reached his first career final on the ATP Challenger Tour where he and partner Jimmy Wang lost in the doubles final of the 2018 Kaohsiung Challenger to Yang Tsung-hua and Hsieh Cheng-peng 7–6(7–3), 2–6, [8–10], in an all-Taiwanese final.

2023: Major and Masters debuts and first wins, top 175 Hsu made his Grand Slam debut by qualifying for the 2023 Australian Open, beating Evan Furness, Elias Ymer and Alexandre Muller.

He also qualified for the US Open and won his first round match against Thanasi Kokkinakis, making him the fifth Taiwanese men's singles player to ever qualify for the tournament, and the third Taiwanese man to win a Major match in history.

He made his debut in qualifying at a Masters 1000 level at the 2023 Rolex Shanghai Masters. He qualified for the main draw and recorded his first Masters 1000 wins defeating Max Purcell and 17th seed Lorenzo Musetti. He lost to 16th seed and eventual champion Hubert Hurkacz. He reached a career high ranking of No. 158 on 16 October 2023.

2025: Two Challenger doubles titles, top 150 Hsu Yu-hsiou won two ATP Challenger doubles titles at the 2025 Open Sopra Steria de Lyon with Kaichi Uchida and at the 2025 Cranbrook Tennis Classic with Huang Tsung-hao.

Performance timeline

Singles

ATP Challengers and ITF finals

Singles: 24 (15–9) Legend (singles)ATP Challenger Tour (1–2)ITF Futures/World Tennis Tour (14–7)Titles by surfaceHard (15–9)Clay (0–0)

Doubles: 46 (31–15) Legend (doubles)ATP Challenger Tour (7–4)ITF Futures/World Tennis Tour (24–11)Titles by surfaceHard (26–14)Clay (5–1)

Junior Grand Slam finals Doubles: 3 (3 titles)