Cai Yun (born 19 January 1980) is a former professional badminton player representing China. He is the 2012 London Olympic gold medallist and a four-time World Champion in men's doubles. He is regarded as one of the greatest men's doubles player of all time.

Combining Cai Yun's impressive speed with his regular partner Fu Haifeng's impressive power, Cai and Fu have been one of the world's leading men's doubles teams since 2004. They have won numerous top tier events on the world circuit including the venerable All England Open Championships in 2005 and 2009. They have won the BWF World Championships 4 times in 2006, 2009, 2010 and 2011, becoming the first Men's Doubles pair to achieve this feat. Cai and Fu have helped China win five consecutive Thomas Cup (Men's Team World Badminton Championships) (2004, 2006, 2008, 2010, and 2012) and six consecutive Sudirman Cup (World Team Championships) (2005, 2007, 2009, 2011, 2013 and 2015). Cai and Fu also competed together in the Olympic games 3 times, including the 2004, the 2008 Olympic Games and the 2012 Olympic Games. They were eliminated in the quarterfinals in 2004, and in 2008 in Beijing were silver medalists, losing a close final to Indonesia's Markis Kido and Hendra Setiawan.

At the 2010 BWF World Championships, they, being the fifth-seed, beat the third-seed Danish pair Mathias Boe and Carsten Mogensen 21–11, 21–18 in the quarterfinals. In the semifinals, they defeated the second-seed Indonesian Olympic Champions Markis Kido and Hendra Setiawan 21–16, 21–13. In the finals, they overcame the first-seed and Malaysian world no. 1 Koo Kien Keat and Tan Boon Heong 18–21, 21–18, 21–14 to win the world title for the 3rd time. They are the first Men's Doubles pair to achieve this feat.

Cai and Fu went on to win the Li-Ning China Masters Super Series. Being the fifth-seed, they first defeated their second-seed compatriots Xu Chen and Guo Zhendong 21–11, 21–16 in the quarterfinals. In the semifinals, they made a great comeback against the third-seed South Korean rival Lee Yong-dae and Jung Jae-sung 20–22, 21–13, 21–17. Cai and Fu then clinched their second China Masters title by defeating the fourth-seed South Korean pair Yoo Yeon-seong and Ko Sung-hyun in 2 sets 21–14, 21–19. Cai and Fu won their third title in a row by winning the Yonex Japan Open Super Series. They, being the fifth-seed, beat the young Korean Pair Cho Gun-woo and Kwon Yi-goo 21–14, 16–21, 21–12 in the quarterfinals. In the semifinals, they defeated their promising compatriots Zhang Nan and Chai Biao 21–17, 21–16. In the finals, they made a great comeback again against the first-seed and Malaysian world no. 1 Koo Kien Keat and Tan Boon Heong 18–21, 21–14, 21–12 to win their first Japan Open title.

In the 2012 Summer Olympics, they defeated Denmark's Mathias Boe and Carsten Mogensen in the final to win the gold medal.

Having won 1 Olympic gold medal and 4 World Championship titles, as well as many other titles, Cai and Fu is one of the most successful men's doubles pairs in badminton history. They have expressed the will to continue their career together as long as they can after the London Olympics.

Men's doubles

Year	Venue	Partner	Opponent	Score	Result
2008	Beijing University of Technology Gymnasium, Beijing, China	Fu Haifeng	Markis Kido Hendra Setiawan	21–12, 11–21, 16–21	Silver
2012	Wembley Arena, London, Great Britain	Fu Haifeng	Mathias Boe Carsten Mogensen	21–16, 21–15	Gold

Men's doubles

Year	Venue	Partner	Opponent	Score	Result
2003	National Indoor Arena, Birmingham, United Kingdom	Fu Haifeng	Sigit Budiarto Candra Wijaya	15–6, 10–15, 9–15	Bronze
2006	Palacio de Deportes de la Comunidad, Madrid, Spain	Fu Haifeng	Robert Blair Anthony Clark	21–9, 21–13	Gold
2009	Gachibowli Indoor Stadium, Hyderabad, India	Fu Haifeng	Jung Jae-sung Lee Yong-dae	21–18, 16–21, 28–26	Gold
2010	Stade Pierre de Coubertin, Paris, France	Fu Haifeng	Koo Kien Keat Tan Boon Heong	18–21, 21–18, 21–14	Gold
2011	Wembley Arena, London, England	Fu Haifeng	Ko Sung-hyun Yoo Yeon-seong	24–22, 21–16	Gold
2013	Tianhe Sports Center, Guangzhou, China	Fu Haifeng	Mohammad Ahsan Hendra Setiawan	19–21, 17–21	Bronze

Men's doubles

Year	Venue	Partner	Opponent	Score	Result
2005	Olympic Park, Yiyang, China	Fu Haifeng	Sigit Budiarto Candra Wijaya	21–11, 21–18	Gold
2006	Olympic Park, Yiyang, China	Fu Haifeng	Lin Woon Fui Mohd Fairuzizuan Mohd Tazari	15–21, 21–13, 17–21	Bronze

Men's doubles

Year	Venue	Partner	Opponent	Score	Result
2011	Sichuan Gymnasium, Chengdu, China	Fu Haifeng	Hirokatsu Hashimoto Noriyasu Hirata	21–12, 21–15	Gold
2015	Wuhan Sports Center Gymnasium, Wuhan, China	Lu Kai	Mohammad Ahsan Hendra Setiawan	12–21, 21–18, 16–21	Bronze

Boys' doubles

Year	Venue	Partner	Opponent	Score	Result
1998	Sports and Aquatic Centre, Melbourne, Australia	Jiang Shan	Chan Chong Ming Teo Kok Seng	7–15, 3–15	Silver

Mixed doubles

Year	Venue	Partner	Opponent	Score	Result
1998	Sports and Aquatic Centre, Melbourne, Australia	Xie Xingfang	Chan Chong Ming Joanne Quay	4–15, 3–15	Bronze

Boys' doubles

Year	Venue	Partner	Opponent	Score	Result
1997	Ninoy Aquino Stadium, Manila, Philippines	Zhang Yi	Chan Chong Ming Jeremy Gan		Silver

The BWF Superseries, which was launched on 14 December 2006 and implemented in 2007,^[3] was a series of elite badminton tournaments, sanctioned by the Badminton World Federation (BWF). BWF Superseries levels were Superseries and Superseries Premier. A season of Superseries consisted of twelve tournaments around the world that had been introduced since 2011.^[4] Successful players were invited to the Superseries Finals, which were held at the end of each year.

Men's doubles

Year	Tournament	Partner	Opponent	Score	Result
2007	All England Open	Fu Haifeng	Koo Kien Keat Tan Boon Heong	15–21, 18–21	Runner-up
2007	Singapore Open	Fu Haifeng	Choong Tan Fook Lee Wan Wah	16–21, 24–22 , 21–18	Winner
2007	Indonesia Open	Fu Haifeng	Mohd Zakry Abdul Latif Mohd Fairuzizuan Mohd Tazari	21–17, 22–20	Winner
2007	China Masters	Fu Haifeng	Markis Kido Hendra Setiawan	21–15, 21–16	Winner
2007	French Open	Fu Haifeng	Choong Tan Fook Lee Wan Wah	21–14, 21–19	Winner
2008	Korea Open	Fu Haifeng	Luluk Hadiyanto Alvent Yulianto	21–7, 20–22 ,21–17	Winner
2008	French Open	Xu Chen	Markis Kido Hendra Setiawan	18–21, 19–21	Runner-up
2009	All England Open	Fu Haifeng	Han Sang-hoon Hwang Ji-man	21–17, 21–15	Winner
2009	Indonesia Open	Fu Haifeng	Jung Jae-sung Lee Yong-dae	15–21, 18–21	Runner-up
2009	China Masters	Fu Haifeng	Guo Zhendong Xu Chen	Walkover	Runner-up
2010	Korea Open	Fu Haifeng	Jung Jae-sung Lee Yong-dae	11–21, 21–14 , 18–21	Runner-up
2010	China Masters	Fu Haifeng	Ko Sung-hyun Yoo Yeon-seong	21–14, 21–19	Winner
2010	Japan Open	Fu Haifeng	Koo Kien Keat Tan Boon Heong	18–21, 21–14 , 21–12	Winner
2011	Singapore Open	Fu Haifeng	Hendra Aprida Gunawan Alvent Yulianto	21–17, 21–13	Winner
2011	Indonesia Open	Fu Haifeng	Chai Biao Guo Zhendong	21–13, 21–12	Winner
2011	China Masters	Fu Haifeng	Jung Jae-sung Lee Yong-dae	17–21, 10–21	Runner-up
2011	Japan Open	Fu Haifeng	Mohammad Ahsan Bona Septano	21–13, 23–21	Winner
2011	Denmark Open	Fu Haifeng	Jung Jae-sung Lee Yong-dae	16–21, 17–21	Runner-up
2011	French Open	Fu Haifeng	Jung Jae-sung Lee Yong-dae	21–14, 15–21 , 11–21	Runner-up
2011	Hong Kong Open	Fu Haifeng	Jung Jae-sung Lee Yong-dae	14–21, 24–22 , 21–19	Winner
2012	Korea Open	Fu Haifeng	Jung Jae-sung Lee Yong-dae	18–21, 21–17 , 21–19	Winner
2012	All England Open	Fu Haifeng	Jung Jae-sung Lee Yong-dae	23–21, 9–21 , 14–21	Runner-up
2012	Hong Kong Open	Fu Haifeng	Koo Kien Keat Tan Boon Heong	21–16, 21–17	Winner
2014	Singapore Open	Lu Kai	Lee Sheng-mu Tsai Chia-hsin	21–19, 21–14	Winner

  BWF Superseries Finals tournament

  BWF Superseries Premier tournament

  BWF Superseries tournament

The BWF Grand Prix had two levels, the Grand Prix and Grand Prix Gold. It was a series of badminton tournaments sanctioned by the Badminton World Federation (BWF) and played between 2007 and 2017. The World Badminton Grand Prix was sanctioned by the International Badminton Federation from 1983 to 2006.

Men's doubles

Year	Tournament	Partner	Opponent	Score	Result
2003	Malaysia Open	Fu Haifeng	Kim Dong-moon Lee Dong-soo	15–17, 11–15	Runner-up
2003	German Open	Fu Haifeng	Eng Hian Flandy Limpele	15–9, 8–15, 4–15	Runner-up
2004	Swiss Open	Fu Haifeng	Luluk Hadiyanto Alvent Yulianto	15–9, 17–14	Winner
2004	Japan Open	Fu Haifeng	Ha Tae-kwon Kim Dong-moon	7–15, 15–6, 6–15	Runner-up
2004	Indonesia Open	Fu Haifeng	Luluk Hadiyanto Alvent Yulianto	8–15, 11–15	Runner-up
2005	German Open	Fu Haifeng	Jens Eriksen Martin Lundgaard Hansen	6–15, 15–3, 15–10	Winner
2005	All England Open	Fu Haifeng	Lars Paaske Jonas Rasmussen	15–10, 15–6	Winner
2005	Malaysia Open	Fu Haifeng	Sigit Budiarto Candra Wijaya	11–15, 14–17	Runner-up
2005	Hong Kong Open	Fu Haifeng	Jens Eriksen Martin Lundgaard Hansen	15–13, 15–9	Winner
2006	China Masters	Fu Haifeng	Jens Eriksen Martin Lundgaard Hansen	17–21, 17–21	Runner-up
2006	Chinese Taipei Open	Fu Haifeng	Jung Jae-sung Lee Yong-dae	21–14, 21–18	Winner
2006	Macau Open	Fu Haifeng	Guo Zhendong Zheng Bo	21–12, 9–21, 21–19	Winner
2006	China Open	Fu Haifeng	Markis Kido Hendra Setiawan	16–21, 16–21	Runner-up
2008	Thailand Open	Fu Haifeng	Guo Zhendong Xie Zhongbo	21–17, retired	Winner
2015	Swiss Open	Lu Kai	Goh V Shem Tan Wee Kiong	21–19, 14–21, 21–17	Winner

  BWF Grand Prix Gold tournament

  BWF & IBF Grand Prix tournament

Cai Yun married synchronised swimmer Wang Na in 2010. Wang Na gave birth to a daughter in 2012,^[5] and to a second child in probably late 2014.^[6][7] (Cai Yun's doubles partner-turned-coach Zhang Jun married Wang Na's teammate Hu Ni in 2006.)

• Cai Yun at BWFBadminton.com
• Cai Yun at BWF.TournamentSoftware.com (alternate link) (archived)
• Cai Yun at Olympedia
• Cai Yun at Olympics.com
• Cai Yun at the Beijing 2008 Olympics (archived)
• Cai Yun's Blog (in Chinese)