Shadow Faces Nico Carrillo For Interim Featherweight Muay Thai Gold

ONE Championship has set an Interim Featherweight Muay Thai World Title fight for ONE Fight Night 40, with Thailand's Shadow Singha Mawynn meeting Scotland's Nico Carrillo on 14 February at Lumpinee Stadium.

The interim championship becomes necessary as reigning ONE Featherweight Muay Thai World Champion Tawanchai PK Saenchai recovers from injuries suffered in his shocking 52-second loss to China's Liu Mengyang at ONE Friday Fights 137, the final show of 2025.

Whoever emerges victorious will secure a future unification bout with Tawanchai for the undisputed featherweight Muay Thai crown.

Shadow enters this title opportunity riding significant momentum from his Muay Thai performances. The Singha Mawynn representative has compiled a six-fight winning streak in "the art of eight limbs."

Shadow's most recent promotional defeat came in September 2025 when he made his kickboxing debut against Liu. The loss represents a minor blemish on an otherwise stellar ONE Championship campaign dominated by Muay Thai excellence.

Now, fighting at home in Bangkok, Shadow has the opportunity to claim interim gold and position himself for an all-Thai championship unification with Tawanchai.

Carrillo brings his own compelling narrative into this Valentine's Day showdown. The "King of the North" has experienced both the agony of championship defeat and the satisfaction of redemption at a new weight class.

After compiling four consecutive victories over elite competition, Carrillo challenged Nabil Anane for the ONE Interim Bantamweight Muay Thai World Championship in January 2025. The bout ended in devastating fashion when Anane stopped the Scottish striker via TKO, delivering Carrillo his first promotional loss.

The setback prompted Carrillo's move to featherweight, where he immediately found success. Second-round stoppages of Thai veteran Sitthichai Sitsongpeenong and Luke Lessei in 2025 announced his arrival at 145 pounds.

Carrillo's 6-1 promotional record and 29-4 career mark underscore his status as one of the sport's most lethal finishers, making this interim title shot an opportunity for redemption after his bantamweight disappointment.