ONE Championship: Mikey Musumeci to defend submission grappling title vs Osamah Almarwai at US debut
- Musumeci will defend his flyweight belt against debuting IBJJF no-gi champ Almarwai on May 5 in Denver, Colorado
- Event now features three title fights, and appearances from several of the promotion’s biggest MMA stars

Mikey Musumeci’s next title defence will occur on home soil.
The American, ONE Championship’s inaugural flyweight submission grappling champ, is set to defend his belt against Saudi Arabia’s Osamah Almarwai at ONE Fight Night 10 on May 5 in Denver, which will be the promotion’s first event in the United States.
ONE revealed the submission grappling title fight on social media on Tuesday.
New Jersey-born Musumeci, 26, won ONE’s flyweight submission grappling title in late September of last year, when he defeated Brazil’s Cleber Sousa by unanimous decision.
He has defended his belt one time in the intervening months, defeating Mongolia’s Bayanduuren Gantumur. That victory also came by way of decision, though not for lack of trying on Musumeci’s part.

Almarwai, who also represents Yemen, will be making his ONE debut. However, he has collected some impressive accolades outside the Circle.