Regian Eersel Vs. Rungrawee Headlines ONE Fight Night 42, Tang Kai Vs. Shamil Gasanov Moves To ONE Fight Night 43
ONE Fight Night 42 on Prime Video has a new main event, and it features the striking world’s finest.
ONE Lightweight Muay Thai World Champion Regian “The Immortal” Eersel will challenge surging 30-year-old Thai native Rungrawee “Legatron” Sitsongpeenong on April 10, live in U.S. primetime from Bangkok’s Lumpinee Stadium for the division’s vacant kickboxing crown.
The title showdown replaces the previously announced headlining clash between ONE Featherweight MMA World Champion Tang Kai and Shamil “The Cobra” Gasanov. The Russian challenger suffered an injury in training camp, pushing that championship fight to ONE Fight Night 43 on May 15.
With the stage set, all eyes turn to one of the most accomplished titleholders in ONE history.
Eersel has long been the gold standard of the lightweight ranks. “The Immortal” carved out a staggering 22-fight winning streak spanning eight years of competition, including a perfect 10-0 start inside ONE.
Behind that towering frame and whip-like limbs lay something more dangerous than raw athleticism. Eersel backed those physical gifts with sniper-like precision. The timing, the power, and the relentless will to win delivered him both the inaugural ONE Lightweight Kickboxing and Muay Thai World Titles, making him a rare fighter to conquer two sports.
His resolve faced its sternest test when Alexis “Barboza” Nicolas handed him a unanimous decision loss at ONE Fight Night 21 in 2024. That defeat cost him the kickboxing crown.
The measure of a champion is how they answer adversity, and the 33-year-old answered emphatically. He dismantled Nicolas in dominant fashion at ONE Fight Night 25 to reclaim his throne. Unfortunately, Eersel failed to make weight in the pair’s trilogy bout at ONE Fight Night 30 and, although he won, he was stripped of his kickboxing crown.
With that rivalry settled, Eersel turned his attention back to “the art of eight limbs” and made an unforgettable statement.
Facing British brawler George “G-Unit” Jarvis at ONE Fight Night 34 last August, he unleashed the full weight of his arsenal, finishing the challenger in just 84 seconds.
That devastating knockout pushed his record to 64-5 and further cemented his reputation as one of the pound-for-pound best strikers in the world.
Looking to pull off a monumental upset under kickboxing rules is Rungrawee, a fighter whose legend was built long before the ONE spotlight.
A fighter with over 200 career bouts, “Legatron” is a revered figure in Thai striking circles. His technical ring savvy, devastating leg kicks, and ruthless combinations have left a trail of opponents limping.
Global audiences have since witnessed that brilliance firsthand, as Rungrawee dazzled in each of his first three promotional appearances.
He continued building his case for a title shot with a string of commanding performances. A clinical TKO victory over Shakir Al-Tekreeti displayed his finishing instincts, while a composed split-decision win over Bogdan Shumarov in his ONE kickboxing debut showcased his adaptability across rule sets.
That momentum carried into ONE Fight Night 34, where Rungrawee delivered perhaps his most complete performance to date. The calculating Thai picked apart Youssef Assouik with surgical precision to earn a unanimous decision victory that snapped the Danish-Moroccan’s six-year winning streak.
What makes this matchup compelling is the physical symmetry. Rungrawee carries the height and length to operate in Eersel’s range, setting the stage for a battle between two cerebral technicians who thrive on timing and precision.
On April 10, two elite strikers clash for gold in what promises to be a masterclass in the striking arts.
With Tang Kai and Gasanov also set to collide at ONE Fight Night 43, two massive nights of combat sports excellence are on the horizon.
