Juniors

Wang started playing tennis at age seven and quickly emerged as one of Asia's most highly touted junior players. He made the final of the 2001 Australian Open Boys' Singles (losing to Janko Tipsarević) and the final of the US Open Boys' Singles (losing to Gilles Müller).

As a junior, he compiled a 136–52 win–loss record in singles (and 78–57 in doubles), reaching as high as No. 3 in the world junior singles rankings in April 2001 (and No. 8 in doubles).

Junior Slam results – Singles:

Australian Open: F (2001)
French Open: 1R (2000, 2001)
Wimbledon: SF (2001)
US Open: F (2001)

Pro tour

Wang turned pro in 2003 and has improved his game and ranking year each he has been on the professional circuit. In 2005, Wang broke into the ATP Top 100 for the first time by virtue of three straight Challenger final appearances, winning a title at Istanbul, Turkey. The 21-year-old also reached the quarterfinal round of the ATP event in Bangkok, Thailand, and lost to Rafael Nadal in the 1st round in Beijing, China at the China Open. Wang made his Grand Slam debut at Wimbledon in 2004, losing to Andy Roddick in the first round. In 2006, he reached the second round, bowing out to James Blake 3 sets to 1.

Wang's best Grand Slam performance to date came at Wimbledon in 2014, where he defeated Alejandro González and Mikhail Youzhny to advance to the third round, ultimately losing to Jo-Wilfried Tsonga.

He was a member of the Chinese Taipei Davis Cup team, compiling a 17–6 record in Davis Cup action since 2001.

Near the end of his career, Wang took breaks from competing due to a persistent wrist injury. With several years of recovery, he decided to play in doubles while helping out the young players. He was content with the results during 2019 and briefly considered making a comeback for some time. However, Wang got tired of traveling around the world to train and compete, which made him start thinking about retirement from professional tennis. His decision was strengthened after getting married and the birth of his child, and Wang eventually started focusing on other things.^[1] In September 2019, he played his last match at the 2019 OEC Kaohsiung in doubles with Hsu Yu-hsiou.

Singles: 2 (2 runners-up)

Result	Year	Tournament	Surface	Opponent	Score
Loss	2001	Australian Open	Hard	Janko Tipsarević	6–3, 5–7, 0–6
Loss	2001	US Open	Hard	Gilles Müller	6–7(5–7), 2–6

Singles

Singles: 29 (13–16)

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Win	1–0	May 2001	Japan F4, Fukuoka	Futures	Hard	Gouichi Motomura	6–4, 2–0 ret.
Loss	1–1	Aug 2001	Chinese Taipei F2, Kao-Hsiung	Futures	Hard	Tasuku Iwami	6–4, 5–7, 5–5 ret.
Loss	1–2	Nov 2001	Thailand F2, Nonthaburi	Futures	Hard	Aisam Qureshi	4–6, 6–4, 5–7
Loss	1–3	Feb 2002	United Arab Emirates F2, Abu Dhabi	Futures	Hard	Marco Chiudinelli	6–7(0–7), 2–6
Win	2–3	Apr 2002	Uzbekistan F1, Karshi	Futures	Hard	Igor Kunitsyn	7–5, 6–4
Loss	2–4	Apr 2002	Uzbekistan F2, Guliston	Futures	Hard	Branislav Sekáč	3–6, 6–2, 4–6
Win	3–4	May 2002	Fergana, Uzbekistan	Challenger	Hard	Tuomas Ketola	6–3, 6–1
Loss	3–5	Jun 2002	Japan F5, Fukuoka	Futures	Hard	Gouichi Motomura	2–6, 4–6 ret.
Win	4–5	Nov 2002	USA F28, Costa Mesa	Futures	Hard	Doug Bohaboy	4–6, 6–2, 6–2
Loss	4–6	Jun 2003	Andorra la Vella, Andorra	Challenger	Hard	Gregory Carraz	2–6, 3–6
Win	5–6	Sep 2003	Indonesia F2, Jakarta	Futures	Hard	Ti Chen	7–6(7–4), 6–4
Loss	5–7	Oct 2003	Dharwad, India	Challenger	Hard	Danai Udomchoke	6–7(5–7), 1–6
Win	6–7	Nov 2003	Chinese Taipei F1, Kaohsiung	Futures	Hard	Jun Kato	6–4, 6–1
Win	7–7	Mar 2005	Ho Chi Minh City, Vietnam	Challenger	Hard	Tomas Behrend	6–3, 7–6(7–4)
Win	8–7	Jun 2005	Spain F13, Lanzarote	Futures	Hard	Artem Sitak	6–3, 6–3
Loss	8–8	Jul 2005	Valladolid, Spain	Challenger	Hard	Filip Prpic	2–6, 6–7(5–7)
Loss	8–9	Aug 2005	Segovia, Spain	Challenger	Hard	Michael Berrer	5–7, 7–6(8–6), 1–6
Win	9–9	Sep 2005	Istanbul, Turkey	Challenger	Hard	Michael Berrer	4–6, 6–4, 6–3
Loss	9–10	Mar 2006	Wolfsburg, Germany	Challenger	Carpet	Alexander Waske	2–6, 4–6
Loss	9–11	May 2007	Uzbekistan F2, Namangan	Futures	Hard	Lukáš Rosol	6–7(2–7), 4–6
Win	10–11	Jun 2007	Busan, South Korea	Challenger	Hard	Jan Vacek	6–3, 6–2
Win	11–11	Jul 2007	Recanati, Italy	Challenger	Hard	Andrey Golubev	6–3, 3–6, 6–4
Win	12–11	May 2011	Mexico F3, Mexico City	Futures	Hard	Miguel Gallardo Valles	7–5, 7–5
Loss	12–12	Oct 2011	Seoul, South Korea	Challenger	Hard	Lu Yen-hsun	5–7, 3–6
Loss	12–13	Nov 2011	Thailand F5, Phuket	Futures	Hard	Laurent Rochette	4–6, 6–7(4–7)
Loss	12–14	Apr 2013	Leon, Mexico	Challenger	Hard	Donald Young	2–6, 2–6
Loss	12–15	Feb 2014	Chitre, Panama	Challenger	Hard	Wayne Odesnik	7–5, 4–6, 4–6
Loss	12–16	May 2014	Busan, South Korea	Challenger	Hard	Go Soeda	3–6, 6–7(5–7)
Win	13–16	Apr 2016	China F4, Zhangjiagang	Futures	Hard	Lee Duckhee	7–5, 6–3

Doubles: 16 (6–10)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Dec 2001	Philippines F1, Manila	Futures	Hard	Hiroki Kondo	Hendri-Susilo Pramono Febi Widhiyanto	6–2, 6–4
Win	2–0	Dec 2001	Philippines F2, Manila	Futures	Hard	Hiroki Kondo	Dirk Stegmann Coenie Van Wyk	6–4, 6–4
Win	3–0	Apr 2002	China F1, Kunming	Futures	Hard	Danai Udomchoke	James Auckland Simon Dickson	5–7, 6–3, 6–2
Loss	3–1	Mar 2003	Kyoto, Japan	Challenger	Carpet	Jan Hájek	Amir Hadad Andy Ram	6–3, 3–6, 1–6
Loss	3–2	May 2004	Forest Hills, United States	Challenger	Clay	Michael Berrer	Jason Marshall Bruno Soares	6–7(5–7), 3–6
Loss	3–3	Jun 2005	Spain F13, Lanzarote	Futures	Hard	Ti Chen	Komlavi Loglo Rafael Moreno-Negrin	5–7, 7–6(10–8), 4–6
Loss	3–4	Mar 2007	Ho Chi Minh City, Vietnam	Challenger	Hard	Sebastian Rieschick	Yu Xinyuan Zeng Shaoxuan	6–7(2–7), 3–6
Loss	3–5	May 2007	Uzbekistan F2, Namangan	Futures	Hard	Ti Chen	Lukáš Rosol Martin Slanar	2–6, 6–3, 1–6
Loss	3–6	May 2011	Mexico F3, Córdoba	Futures	Hard	Adam El Mihdawy	Chris Letcher Brendan Moore	4–6, 3–6
Win	4–6	Jun 2011	USA F14, Chico	Futures	Hard	Vahe Assadourian	Edward Corrie Trevor Dobson	6–4, 6–4
Win	5–6	Oct 2011	Indonesia F5, Palembang	Futures	Hard	Danai Udomchoke	Harri Heliövaara Hiroki Kondo	6–0, 6–1
Loss	5–7	Nov 2011	Thailand F4, Phuket	Futures	Hard	Victor Baluda	Sonchat Ratiwatana Sanchai Ratiwatana	6–7(10–12), 4–6
Loss	5–8	Nov 2012	Helsinki, Finland	Challenger	Hard	Uladzimir Ignatik	Mikhail Elgin Igor Zelenay	6–4, 6–7(0–7), [4–10]
Win	6–8	Mar 2013	Le Gosier, Guadeloupe	Challenger	Hard	Dudi Sela	Florin Mergea Philipp Marx	6–1, 6–2
Loss	6–9	Apr 2017	China F4, Luzhou	Futures	Hard	Peng Hsien-yin	Gao Xin Zhe Li	6–4, 3–6, [6–10]
Loss	6–10	Sep 2018	Kaohsiung, Taiwan	Challenger	Hard	Hsu Yu Hsiou	Hsieh Cheng-peng Yang Tsung-hua	7–6(7–3), 2–6, [2–10]