Rangsiya Nisaisom, who emerged as the first world champion ever in Thailand taekwondo history last year, fell at the first hurdle of the women's 57kg class in the London Olympic Games on Thursday.
She went down 1-4 to top-seeded and current Asian champion Tseng Li-Cheng from Taiwan.
Despite the loss, the 18-year-old from Chon Buri still has a chance to be pitted in the repechage for a bronze medal in condition that Tseng continues her winning streak to book a berth for the final.