Bangkok, Thailand – April 10, 2026: At an exciting ONE Championship event held at the legendary Lumpinee Stadium, Regian Eersel demonstrated his dominance to secure the vacant ONE Lightweight Kickboxing World Championship.

In the main event, the reigning Muay Thai titleholder, Regian Eersel, outpointed Rungrawee “Legatron” Sitsongpeenong with a unanimous decision victory. The Surinamese-Dutch fighter showcased a masterclass over five rounds, solidifying his status as a top-tier competitor.

Eersel, known as “The Immortal,” effectively used his reach to control the distance, landing a high volume of strikes from the outside in the first round. His signature jumping knee techniques kept Rungrawee on the defensive throughout the initial rounds, allowing Eersel to build a significant advantage on the scorecards.

The momentum shifted dramatically in the third round when Eersel unleashed a powerful combination that sent Rungrawee to the canvas for a knockdown. Despite the Thai fighter’s resilience in surviving the onslaught, Eersel maintained his relentless pressure in the fourth round.

In the final round, Rungrawee attempted to take the initiative, but his aggression led to an illegal elbow, resulting in a point deduction. This incident seemed to fuel Eersel’s offensive output, as he finished the match with an explosive display of striking to seal his victory.

All three judges scored the bout in favor of Eersel, crowning him the undisputed lightweight king and a two-sport ONE World Champion once again.

The Inner Circle (April 10 Results)

Regian Eersel def. Rungrawee Sitsongpeenong via unanimous decision to claim the vacant ONE Lightweight Kickboxing World Championship

Isaac Mohammed def. Rittidet Lukjaoporongtom via KO (punches+elbow) at 0:45 of round three (Muay Thai – Strawweight)

Elies Abdelali def. Hicham Zerouali via TKO (referee stoppage) at 1:14 of round two (Muay Thai – Featherweight)

Logan Chan def. Kaokarat Sor Tienpo via KO (left hook) at 0:34 of round two (Muay Thai – Bantamweight)

Kota Abe def. Hero Marco Manguray via KO (ground and pound) at 1:47 of round three (MMA – Lightweight)

English Translation:

Regian Eersel Captures Vacant ONE Lightweight Kickboxing World Title

Bangkok, Thailand – April 10, 2026: ONE Championship (ONE) hosted another thrilling evening at the historic Lumpinee Stadium with "The Inner Circle" event.

In the main event, lightweight Muay Thai titleholder Regian Eersel defeated Thailand's Rungrawee “Legatron” Sitsongpeenong by unanimous decision to win the vacant ONE Lightweight Kickboxing World Championship. The Surinamese-Dutch superstar once again proved why he is a pound-for-pound great with a masterful five-round performance.

“The Immortal” Eersel used his length to keep Rungrawee on the outside, launching a high volume of combinations from range in the first round. Eersel’s signature jumping knees kept his Thai opponent constantly on the back foot in the first two stanzas, as the Amsterdam native built a commanding lead on the scorecards.

Eersel’s momentum peaked in the third frame when he uncorked a blistering combination that sent Rungrawee crashing to the canvas for a significant knockdown. The Thai warrior showed incredible heart to survive the onslaught, but Eersel continued his relentless attack in the fourth.

Rungrawee attempted to press the action in the fifth round, but his desperation led to costly mistakes, as the Thai athlete was deducted a point for an illegal elbow. The fouls ignited Eersel’s offense, and he went completely berserk with his attacks in the final moments of the match to cement his dominance.

All three judges awarded the match to Eersel, crowning him the undisputed king of the lightweight division and a two-sport ONE World Champion once more.