Career
At the 2000 Summer Olympics, Ponsana was defeated in the Round of 64. Ponsana played badminton at the 2004 Summer Olympics in men" singles, defeating Chris Dednam of South Africa and Lee Hyun-il of of Korea in the first two rounds. In the quarterfinals, Ponsana defeated Ronald Susilo of Singapore 15-10, 15-1.
Ponsana advanced to the semifinals, in which he lost to Taufik Hidayat of Indonesia 15-9, 15-2.
Playing in the bronze medal match, he again lost to an Indonesian, this time Soni Dwi Kuncoro by a score of 15-11, 17-16 for a fourth-place finish. Boonsak Ponsana competed in Final 2009 but he did not qualify for the semi-finals.
At the 2008 Summer Olympics, he reached the second round of the men"s singles, where he lost 2 - 0 to Indonesia"s Sony Dwi Kuncoro. In 2012, he repeated his successful run at the Singapore Open beating Zhengming Wang of China in a thrilling two set match.
Prior to his participation in the 2012 Singapore Open, injury had caused him to skip some tournaments in 2011, and his earlier 2012 results had not been especially good, although he did qualify for the Olympics again.
In 2013, Boonsak has changed his speciality to men"s doubles and he is now teaming with Songphon Anugritayawon. Key Includes results from all competitions 2001–present against finalists, World Championship semifinalists, Olympic quarterfinalists, and all Olympic opponents.