On March 2, 2009, Usanakorn defeated Rie Fujimoto by fourth-round knockout to win the interim WBC women's world super flyweight championship.[2] She was set to face Ana Maria Torres in a title unification bout on June 13, 2009.[3]
On October 5, 2009, Usanakorn defeated Galina Koleva Ivanova by unanimous to win the WBC female world bantamweight championship.[4] She made one successful title defense against Dong Xiao Juan on October 4, 2011.[5][6]
Usanakorn lost the WBC female world bantamweight title to Susie Ramadan by unanimous decision July 13, 2012. There was controversy after the fight when Ramadan claimed that Usanakorn was male. Usanakorn tested for "highly suspicious" levels of testosterone before her fight with Ramadan in Melbourne. According to The Sydney Morning Herald, Usanakorn tested for three times the amount of testosterone normally found in a woman.[7][8][9][10]
Bare-knuckle boxing career
BKFC Thailand
Usanakorn made her bare-knuckle boxing debut at BKFC Thailand 2: Iconic Impact on May 7, 2022. She defeated Benjamas Phakra by first-round knockout.[11]
On September 3, 2022, Usanakorn defeated Natsuda Yooya by first-round knockout at BKFC Thailand 3: Moment of Truth.[12]