ONE Championship: grappling legend Masakazu Imanari to battle ‘BJJ phenom’ Mikey Musumeci in Singapore

• Japanese grappling legend Imanari will return to the ONE Circle to battle debuting Musumeci at on April 22 at ONE: Reloaded
• The 25-year-old American – a five-time BJJ champion – is already being hailed as next big thing ahead of promotional debut