Thailand's Dejdamrong Sor Amnuaysirichoke lost in his first defending title match in front of his home fans on Friday when he met Japanese fighter Yoshitaka “Nobita” Naito in ONE: Kingdom of Champions at Impact Arena in Bangkok.

With an impressive record of 10 wins from 10, Naito retained his unbeaten record by toppling Dejdamrong, winning by submission with a rear naked choke to capture the ONE Strawweight World Championship.

The end came in the fourth round as Naito executed the rear naked choke he had been chasing throughout the bout. Meanwhile, two Cambodian fighters were knocked out in the first round.

Khon Sichan was beaten by technical knockout by Yodsanan “Little Tyson” Sityodtong, who lived up to his moniker with thunderous punches, kicks and knees that proved too much for Sichan, who crumbled to the mat and was finished off minutes into the first.

The other Cambodian, Kev Hemmorlor, was beaten by Kritsada “Dream Man” Konsrichai, also by a technical knockout. In a highly anticipated matchup, Russia’s Timofey Nastyukhin needed just six seconds to stop Australia’s Rob Lisita in the first round, tying a ONE Championship record for fastest knockout.

Nastyukhin met Lisita at the centre of the cage as soon as the bell rang and immediately clipped Lisita with a right hook that dropped the Aussie. Seconds later, a technical ground kick landed to seal the deal.

In the co-main event of the evening, reigning ONE Featherweight World Champion Marat “Cobra” Gafurov impressed with another rear naked choke submission over Japanese MMA veteran Kazunori Yokota to remain unbeaten as a professional mixed martial artist.

Stylistic disadvantage

Polish mixed martial artist Marcin Prachnio and Brazilian Leandro Ataides pummelled each other with punishing combinations over three rounds of solid action to the delight of the packed crowd. It was a close and gruelling bout that undoubtedly left both fighters exhausted by the final bell.

In the end, Prachnio showed a little more down the stretch and did just enough to edge out Ataides, winning by unanimous decision in a clash of heavy-hitters.

Local favourite Shannon “One Shin” Wiratchai was emotional after emerging victorious over Myanmar’s Kyal Linn Aung, winning by submission for the first time in front of friends and family in his native Bangkok.

Wiratchai showcased his pinpoint accurate striking early on, before going to the ground where Aung was at a stylistic disadvantage.

After gaining mount and tagging Aung with heavy elbows, Wiratchai took his opponent’s back and secured the fight-ending choke.

Fast-rising featherweight prospect Christian “The Warrior” Lee traded lightning quick strikes with Filipino fighter Rocky “The Outlaw” Batolbatol for a little over half of the first round, winning by referee stoppage to notch his fifth straight victory inside the ONE Championship cage.

Lee rocked Batolbatol with a right hand and had him pressed up against the cage where he unleashed a flurry as the Filipino fell to the canvas.

In the second preliminary bout, unbeaten strawweight prospect Pongsiri Mitsatit of Chiang Mai made quick work of Myanmar’s Ye Thway Ne, unleashing a devastating series of knees on the ground to earn the victory also in the first round.