Toshihide Matsui (松井 俊英, Matsui Toshihide, born 19 April 1978) is a professional Japanese tennis player. On 12 June 2006, he reached his highest ATP singles ranking of No. 261. He achieved his highest doubles ranking of No. 123 in February 2024.^[1] He is currently the oldest active singles player in the ATP world doubles rankings.

He was the runner-up in men's singles at the Japanese National Championships in 2006 when he lost the final against Satoshi Iwabuchi.^[2]

He won 6 Japanese national championship titles in men's doubles category: 4 titles with Satoshi Iwabuchi (2005,2007–09) and 2 titles with Kaito Uesugi (2021–22).

When he played at the 2019 Shenzhen Longhua Open against 18-year-old Chun-hsin Tseng as a lucky loser, it was the largest age difference ever in a Challenger match, with Matsui being the oldest player at 41 years old, with an ATP ranking.^[3]

He represented Japan in three Davis Cup ties between 2006 and 2010, his win–loss record is 4–1. Plus Matsui participated in the first 2 editions of ATP Cup in 2020–2021 as a member of Team Japan. Matsui holds the record as the oldest player in ATP Cup history.

In February 2024, Matsui achieved his highest ranking in doubles, No.123, at the age of 45; he later improved this to No. 121 on 27 May 2024, aged 46.^[4]

Based in Kashiwa,^[8] Matsui speaks Japanese and English fluently. In 2010, he was married to a former professional tennis player Tomoyo Takagishi, they have 2 children.

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Win	1–0	Sep 2005	Japan F9, Kashiwa	Futures	Hard	Michael Yani	7–6(8–6), 6–3
Loss	1–1	Dec 2005	Sri Lanka F2, Colombo	Futures	Clay	Go Soeda	6–4, 5–7, 5–7
Loss	1–2	Apr 2006	Chikmagalur, India	Challenger	Hard	Danai Udomchoke	5–7, 4–6
Loss	1–3	Sep 2007	Japan F8, Osaka	Futures	Hard	Yuichi Ito	1–6, 6–2, 4–6
Loss	1–4	May 2008	Korea Rep. F2, Changwon	Futures	Hard	Matthew Ebden	4–6, 5–7
Loss	1–5	Sep 2009	Great Britain F12, London	Futures	Hard	Colin Fleming	6–4, 3–6, 1–6
Loss	1–6	Jun 2010	Japan F7, Tokyo	Futures	Carpet	Hiroki Kondo	6–7(4–7), 6–7(5–7)
Loss	1–7	Dec 2013	Cambodia F3, Phnom Penh	Futures	Hard	Chen Ti	3–6, 4–6
Win	2–7	May 2014	Thailand F5, Bangkok	Futures	Hard	Christopher Rungkat	6–4, 6–1
Loss	2–8	Dec 2014	Cambodia F3, Phnom Penh	Futures	Hard	Huang Liang-chi	5–7, 4–6
Loss	2–9	Jun 2015	Japan F6, Kashiwa	Futures	Hard	Lee Duck-hee	4–6, 2–6

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1	Sep 2002	Japan F6, Kashiwa	Futures	Hard	Lu Yen-hsun	Peter Handoyo Suwandi Suwandi	3–6, 2–6
Win	1–1	Jun 2003	Busan, Korea, Rep.	Challenger	Hard	Michihisa Onoda	Baek Seung-bok Park Seung-kyu	6–1, 6–3
Win	2–1	Jun 2003	Mexico F9, Quintana Roo	Futures	Hard	Michihisa Onoda	Paul Capdeville Sebastián Decoud	6–3, 6–4
Loss	2–2	May 2007	Korea Rep. F2, Daegu	Futures	Hard	Satoshi Iwabuchi	Yu Xinyuan Zeng Shaoxuan	3–6, 7–5, 3–6
Loss	2–3	Nov 2007	Yokohama, Japan	Challenger	Hard	Satoshi Iwabuchi	Hiroki Kondo Go Soeda	7–6(7–5), 3–6, [9–11]
Loss	2–4	May 2008	Korea Rep. F3, Daegu	Futures	Hard	Satoshi Iwabuchi	Kim Young-jun Kwon Oh-hee	6–3, 6–7(5–7), [7–10]
Loss	2–5	May 2009	Busan, Korea, Rep.	Challenger	Hard	Tasuku Iwami	Sanchai Ratiwatana Sonchat Ratiwatana	4–6, 2–6
Win	3–5	May 2010	Fergana, Uzbekistan	Challenger	Hard	Brendan Evans	Gong Maoxin Li Zhe	3–6, 6–3, [10–8]
Win	4–5	Jun 2010	Guam F1, Tumon	Futures	Hard	Tasuku Iwami	Ruben Gonzales Christian Guevara	3–6, 7–5, [10–4]
Loss	4–6	Apr 2012	China F5, Chengdu	Futures	Hard	Yusuke Watanuki	Gao Peng Gao Wan	4–6, 4–6
Loss	4–7	Oct 2012	Japan F9, Ōarai	Futures	Hard	Yi Chu-huan	An Jae-sung Arata Onozawa	6–2, 1–6, [6–10]
Win	5–7	Jan 2013	Nouméa, New Caledonia	Challenger	Hard	Sam Groth	Artem Sitak Jose Statham	7–6(8–6), 1–6, [10–4]
Loss	5–8	Jun 2013	India F6, Chennai	Futures	Hard	Bumpei Sato	Sriram Balaji Jeevan Nedunchezhiyan	1–6, 4–6
Loss	5–9	Jul 2013	Japan F8, Kashiwa	Futures	Hard	Bumpei Sato	Hiroki Kondo Jose Statham	4–6, 2–6
Win	6–9	Jul 2013	Beijing, China, P.R.	Challenger	Hard	Danai Udomchoke	Gong Maoxin Zhang Ze	4–6, 7–6(8–6), [10–8]
Loss	6–10	Aug 2013	China F6, Zhangjiagang	Futures	Hard	Lim Yong-kyu	Sriram Balaji Ranjeet Virali-Murugesan	5–7, 6–7(4–7)
Loss	6–11	Dec 2013	Cambodia F2, Phnom Penh	Futures	Hard	Danai Udomchoke	Takuto Niki Arata Onozawa	6–7(10–12), 6–7(8–10)
Loss	6–12	Feb 2014	Burnie, Australia	Challenger	Hard	Danai Udomchoke	Matt Reid John-Patrick Smith	4–6, 2–6
Win	7–12	Mar 2014	Japan F1, Tokyo	Futures	Hard	Arata Onozawa	Shintaro Imai Takao Suzuki	6–4, 7–5
Loss	7–13	Mar 2014	Japan F3, Kōfu	Futures	Hard	Danai Udomchoke	Takuto Niki Arata Onozawa	4–6, 2–6
Win	8–13	Nov 2014	Toyota, Japan	Challenger	Carpet (i)	Yasutaka Uchiyama	Bumpei Sato Yang Tsung-hua	7–6(8–6), 6–2
Loss	8–14	Feb 2015	New Delhi, India	Challenger	Hard	Riccardo Ghedin	Egor Gerasimov Alexander Kudryavtsev	7–6(7–5), 4–6, [6–10]
Loss	8–15	Apr 2015	Indonesia F1, Tarakan	Futures	Hard (i)	Christopher Rungkat	Matt Seeberger Finn Tearney	2–6, 6–1, [8–10]
Win	9–15	Apr 2015	Indonesia F2, Tegal	Futures	Hard	Christopher Rungkat	Aditya Hari Sasongko Sunu Wahyu Trijati	6–4, 6–2
Win	10–15	Apr 2015	Indonesia F3, Jakarta	Futures	Hard	Christopher Rungkat	Jeevan Nedunchezhiyan Danai Udomchoke	6–4, 6–2
Win	11–15	Apr 2015	Thailand F1, Bangkok	Futures	Hard	Christopher Rungkat	Sanchai Ratiwatana Sonchat Ratiwatana	4–6, 6–3, [10–8]
Win	12–15	Jun 2015	Thailand F4, Bangkok	Futures	Hard	Christopher Rungkat	Sanchai Ratiwatana Sonchat Ratiwatana	4–6, 6–3, [10–2]
Win	13–15	Aug 2015	Thailand F6, Bangkok	Futures	Hard	Christopher Rungkat	Benjamin Mitchell Jordan Thompson	4–6, 6–3, [11–9]
Loss	13–16	Aug 2015	Thailand F7, Bangkok	Futures	Hard	Christopher Rungkat	Pruchya Isaro Nuttanon Kadchapanan	4–6, 6–7(5–7)
Win	14–16	Mar 2016	Japan F1, Tokyo	Futures	Hard	Yuya Kibi	Huang Liang-chi Ben McLachlan	6–3, 6–1
Loss	14–17	Mar 2016	Japan F3, Kōfu	Futures	Hard	Yuya Kibi	Shintaro Imai Takuto Niki	1–6, 2–6
Win	15–17	May 2016	Guam F1, Tumon	Futures	Hard	Andrew Whittington	Sho Katayama Yutaro Matsuzaki	6–3, 3–6, [10–8]
Loss	15–18	Jun 2016	Fergana, Uzbekistan	Challenger	Hard	Vishnu Vardhan	Yannick Jankovits Luca Margaroli	4–6, 6–7(4–7)
Win	16–18	Jun 2017	Japan F6, Karuizawa	Futures	Clay	Christopher Rungkat	Shintaro Imai Takuto Niki	7–5, 6–2
Win	17–18	Jul 2017	Astana, Kazakhstan	Challenger	Hard	Vishnu Vardhan	Evgeny Karlovskiy Evgenii Tiurnev	7–6(7–3), 6–7(5–7), [10–7]
Win	18–18	Sep 2017	Shanghai, China, P.R.	Challenger	Hard	Yi Chu-huan	Bradley Klahn Peter Polansky	7–6(7–1), 4–6, [10–5]
Win	19–18	May 2018	Seoul, Korea, Rep.	Challenger	Hard	Frederik Nielsen	Chen Ti Yi Chu-huan	6–4, 7–6(7–3)
Loss	19–19	Nov 2018	Charlottesville, USA	Challenger	Hard (i)	Frederik Nielsen	Harri Heliövaara Henri Laaksonen	3–6, 4–6
Win	20–19	Nov 2018	Knoxville, USA	Challenger	Hard (i)	Frederik Nielsen	Hunter Reese Tennys Sandgren	7–6(8–6), 7–5
Loss	20–20	May 2019	Busan, Korea, Rep.	Challenger	Hard	Vishnu Vardhan	Hsieh Cheng-peng Christopher Rungkat	6–7(7–9), 1–6
Loss	20–21	Dec 2021	M15 Antalya, Turkey	World Tennis Tour	Clay	Kaito Uesugi	Grigoriy Lomakin Oleg Prihodko	5–7, 6–3, [5–10]
Win	21–21	Jun 2022	M25 Harmon, Guam	World Tennis Tour	Hard	Kaito Uesugi	Nam Ji-sung Song Min-kyu	6–3, 0–6, [10–7]
Win	22–21	Sep 2022	Japan M25 Kashiwa Open	World Tennis Tour	Hard	Kaito Uesugi	Naoki Tajima Seita Watanabe	6–3, 4–6, [10–5]
Loss	22–22	Nov 2022	Matsuyama, Japan	Challenger	Hard	Kaito Uesugi	Andrew Harris John-Patrick Smith	3–6, 6–4, [8–10]
Loss	22–23	Jan 2023	Nouméa, New Caledonia	Challenger	Hard	Kaito Uesugi	Colin Sinclair Rubin Statham	4–6, 3–6
Loss	22–24	Feb 2023	Pune, India	Challenger	Hard	Kaito Uesugi	Anirudh Chandrasekar Vijay Sundar Prashanth	1–6, 6–4, [3–10]
Loss	22–25	Jun 2023	Palmas del Mar, Puerto Rico	Challenger	Hard	Kaito Uesugi	Evan King Reese Stalder	6–3, 5–7, [9–11]
Loss	22–26	July 2023	Astana, Kazakhstan	Challenger	Hard	Kaito Uesugi	S D Prajwal Dev Niki Kaliyanda Poonacha	6–3, 7-6(4–7)
Win	23–26	Aug 2023	Porto, Portugal	Challenger	Hard	Kaito Uesugi	Rithvik Choudary Bollipalli Arjun Kadhe	6–7(5–7), 6–3, [10–5]
Loss	23–27	Nov 2023	Matsuyama, Japan	Challenger	Hard	Kaito Uesugi	Karol Drzewiecki Zdenek Kolar	3–6, 2–6
Loss	23–28	Jan 2024	Nouméa, New Caledonia	Challenger	Hard	Calum Puttergill	Colin Sinclair Rubin Statham	5–7, 2–6
Loss	23–29	May 2024	Wuxi, China	Challenger	Hard	Kaito Uesugi	Reese Stalder Calum Puttergill	6–7(8–10), 6–7(4–7)
Loss	23–30	May 2024	Taipei, Taiwan	Challenger	Hard	Kaito Uesugi	Ray Ho Nam Ji-sung	2–6, 2–6

• Toshihide Matsui at the Association of Tennis Professionals
• Toshihide Matsui at the Davis Cup
• Toshihide Matsui at the International Tennis Federation
• Official website (in Japanese)
• Official blog (in Japanese)