Thanongsak Simsri

Thai boxer (born 2000)

Biography

Thanongsak Simsri, also known by his ring name Petchkoson Greentsuda is a Thai professional boxer who has held the International Boxing Federation (IBF) light-flyweight title since June 2025. He is Thailand's 50th world boxing champion and the third to hold this weight class title in this organization, following Muangchai Kittikasem in 1989 and Saman Sorjaturong in 1995.

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