We use Google reCaptcha to protect our website and the Google Privacy Policy and Terms of Service apply. For more information see our Privacy Policy. Privacy Notice: Newsletters may contain info about charities, online ads, and content funded by outside parties. “I have this great move that I call ‘The Walrus’, where I just lie on top of my opponent & do nothing,” he tweeted. That’s not far off Musk’s actual fight plan. “Elon Musk is just a lot bigger than him, so he could just lie on top of him and hope for the best,” Cresci said. All else being equal, that would put Musk at an advantage, even after taking account of the 12-year age gap between the two. At an estimated 1.87 metres (6ft 1in) and about 85kg (13st 5lb), Musk is several weight classes above Zuckerberg, who measures 1.71 metres (5ft 7ins) and less than 70kg (11st). He’s been having a good time doing his little BJJ competitions.’’

“Zuck’s been training,” said Elena Cresci, a former Guardian journalist and professional muay thai champion, “whereas Elon Musk has been tweeting that he doesn’t train beyond throwing his kids up in the air. Recently, though, his hobby has been Brazilian jiu-jitsu, and when he made his competitive debut last month he won two out of three bouts. In the past he has spent periods learning Mandarin, touring America (in what was widely seen as a dry run for an abortive presidential campaign) and only eating meat he killed with a bow and arrow. Both men seem to have limitless reserves of energy, but where Musk applies that to running five separate companies at the same time, Zuckerberg prefers to get really, really serious about hobbies. The danger for Musk is that Zuckerberg is, apparently, quite good at fighting. In a post on his verified Instagram account, the Meta chief executive shared a screenshot of Musk’s challenge with the caption: “Send Me Location”. What could have been one of many half-thought-out tweets dashed off by Musk – whose itchy posting finger has already brought him a libel suit from a British diver he labelled a “pedo” and an SEC demand for a lawyer to vet his missives after he falsely claimed to have “funding secured” to take Tesla private – became rather more significant when Zuckerberg responded. When a follower warned that the Twitter boss should watch his words around Zuckerberg, Musk responded: “I’m up for a cage match if he is lol.”

“At least it will be ‘sane’,” Musk added.

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