Top-5 undefeated MMA fighters in ONE Championship

#2. Garry Tonon - ONE Championship featherweight (6-0)

If Buchecha shows the potential for a successful transition from jiu-jitsu to MMA, ONE Championship featherweight Garry 'The Lion Killer' Tonon has nearly perfected it.

The only thing missing to fully realize Tonon's legendary move from submission grappling to MMA is a world championship. One that he might get to achieve next year.

Though already a legend in jiu-hitsu, just like 'Buchecha, Tonon never rested on his laurels. He learned from the mistakes of grappling world champions who relied too much on jiu-jitsu but were later defeated. Tonon continually explored other aspects of MMA and approached them with curiosity and respect.

The American has figured out a way to incorporate his grappling genius without being too one-sided, style-wise. Understanding that no one would dare fight him on the ground, Tonon found the freedom to expand and explore his options on the feet.

Because of this, Tonon's striking arsenal has evolved from pesky to utter dangerous. He has earned the respect of his peers in the striking department.

With a complete MMA skillset in his arsenal, expect Tonon to continually grow and improve as he ventures to the top of his division.

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#1. Reinier de Ridder - ONE Championship middleweight and light heavyweight champion (14-0)

Without a doubt, the most high-profile undefeated fighter in ONE Championship is none other than its only double champ, Reinier 'The Dutch Knight' de Ridder. The European fighter is not just after greatness, he's after a spot in history.

'The Dutch Knight' has been undefeated in his career thus far and is aiming to become the first triple-division champion in MMA.

After winning the middleweight belt in dominant fashion and capturing the light heavyweight strap on just six days' notice, de Ridder's undefeated status has become the stuff of legends.

'The Dutch Knight' has a scrappy, aggressive grappling style but also manages to suffocate his opponents with a pressuring stand-up game. He is incredibly strong and can keep the intensity to the latter rounds.

Reinier de Ridder loves to take the fight into deep waters as he decimates his opponents like an octopus killing its prey.

At just 30 years old, the ONE Championship double champ is just reaching his prime. It's a wonder how he sizes up with other champions in ONE Championship or other organizations.