Twitter chairman Elon Musk and Meta boss Mark Zuckerberg have agreed to take each other on in a cage match.
There is rarely a day that goes by where high-profile figures are not challenging each other to step into the boxing ring, or the Octagon.
This time, it appears to be the turn of Musk who, according to Forbes' Real-Time Billionaire Index, is the richest person on the planet.
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Musk rose to public prominence by becoming the largest shareholder of automotive company and car manufacturer Tesla, where he became the CEO in 2008. But he is now better known for his controversial stint at the helm of Twitter, having taken over the social media giant for $44 billion last year.
And taking to the platform, the 52-year-old tweeted that he was "up for a cage fight" with his social media rival.
Zuckerberg then responded to Musk's post, simply stating: "Send me location."
Musk then proposed the Las Vegas Octagon as a potential location for the fight, before giving details of his 'finishing move': "I have this great move that I call 'The Walrus', where I just lie on top of my opponent and do nothing."
Musk vs Zuckerberg
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That probably wouldn't be enough for Musk to win an actual fight, because Zuckerberg does have skills in combat sports.
Last month, the 38-year-old entered a Brazilian jiu-jitsu tournament, winning a gold and a silver medal in the two disciplines he took part in.
Zuckerberg shared photos of the tournament, but did not give its name. He said: "Competed in my first jiu-jitsu tournament and won some medals for the Guerrilla Jiu Jitsu team. Thanks to @davecamarillo @khaiwu @intense0ne for training me."
UFC boss Dana White has also spoken about the bout, he said to TMZ: "Talked with Mark and Elon last night, both guys are absolutely dead serious about this.
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"The biggest fight of all time was Floyd (Mayweather) and Conor (McGregor), I just think it triples that. It triples what that did, there's no limit on what that thing can make."
Verge editor Alex Heath claimed that Zuckerberg is 'serious' about the fight - although his competitor tweeting he 'almost never works out' and pictures of walruses suggests he perhaps isn't.
While the chances of a fight actually taking place are, you imagine, relatively remote, that hasn't stopped people from debating who could win if the match-up occurred - and you never know what could happen.
Ryan Smart