Chatri Trisiripisal (Thai: ชาตรี ตรีศิริพิศาล, RTGS: Chatri Trisiriphisan), known by the ring names as Chatri Sityodtong (Thai: ชาตรี ศิษย์ยอดธง, RTGS: Chatri Sit-yotthong) and Yodchatri Sityodtong (Thai: ยอดชาตรี ศิษย์ยอดธง, RTGS: Yotchatri Sit-yotthong), is a Thai-born entrepreneur and martial arts instructor based in Singapore. He is best known as being the founder, chairman, and chief executive officer of Singapore-based combat sports promotion ONE Championship. He is currently the star of The Apprentice: ONE Championship Edition.