Former ONE Featherweight World Champion Narantungalag Jadambaa took on former ONE Lightweight World Champion Kotetsu Boku at ONE: ASCENT TO POWER in Singapore. Towards the end of the third round, Jadambaa shot in for a single-leg takedown and dragged Boku to the canvas, winding up in side control. From there, Jadambaa worked on a Von Flue choke and pulled off the rare submission. Subscribe to ONE Championship on YouTube: http://bit.ly/ONECHAMPIONSHIP Connect with ONE Championship: ONE Super App: http://bit.ly/ONESuperApp Website: https://onefc.com/ Facebook: https://www.facebook.com/ONEChampionship Twitter: https://twitter.com/ONEChampionship Instagram: https://www.instagram.com/onechampionship