The kickboxer who called out Conor McGregor this week may have strengthened his case with a vicious headkick KO for the ONE championship title.

Kickboxing star Superbon made headlines for his outlandish call-out of the Irishman on Thursday and went on to brutally finish number one contender Giorgio Petrosyan for the featherweight belt.

The fight was expected to be something of a back-and-forth affair between the duo, with Petrosyan one of the best kickboxers in the world.

But in the promotion's inaugural kickboxing world title bout at featherweight at the First Strike event in Kallang, Singapore, Superbon landed a brutal finish halfway through the second round.

Petrosyan was out cold on the canvas

Petrosyan hadn't lost in nine bouts, while Superbon is now riding a seven-fight winning streak.

The brutal finish was set up by some searching kicks, before he flung out a kick that landed right on the chin, sending his rival to sleep.

He is now the man to beat at 155lbs in ONE Championship kickboxing, and has insisted he would be a top opponent for McGregor.

The Irishman is currently in Rome collecting a luxury yacht as he continues to recover from a nasty broken leg that he suffered in his last outing against Dustin Poirier.

And with no clear timeline or opponent lined up for his return, Superbon took the chance to throw his hat in the ring for a bout.

A mixed-rules bout between his co-star Rodtang and former UFC star Demetrius Johnson will take place in December this year.

Superbon celebrated wildly after flooring his opponent and is now eyeing McGregor

And attempting to follow in their footsteps, ONE championship kickboxer Superbon plans to cross paths with McGregor in a mixed-rules bout of his own in the future.

"Well it's quite a new thing for me because I've never seen this kind of mixed rules fight before," Superbon said.

"Rodtang is very good in Muay Thai while DJ is great in MMA so they've got the things that they need to do.

"If I have a chance I'd be interested too. I don't know when, but I'd love to do that. I haven't tried MMA yet - but if you asked me [who I'd like to fight], I'd say Conor McGregor, because I think I could beat him down!"

And while it may seem a ludicrous prospect, McGregor is no stranger to crossover bouts having face Floyd Mayweather in 2017.

He lost that bout, but wowed fans with his ability to keep up the pace with one of boxing's greatest ever fighters.

And years later, he indicated an interest in facing Tenshin Nasukawa, a renowned kickboxer who once faced Mayweather in an exhibition boxing match.

McGregor was set to face Manny Pacquiao before the onset of the coronavirus pandemic, but after losing twice to Dustin Poirier this year, coupled with a legal battle, the bout failed to materialise.

The Irishman is now expected to return to the octagon next year.

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