Meta CEO Mark Zuckerberg has shown off his ripped physique amid reports of a cage fight challenge to Twitter boss Elon Musk. In a photo posted on social media, Mr Zuckerberg is seen posing alongside Mixed Martial Arts (MMA) fighters Israel Adesanya and Alex Volkanvski. The 39-year-old billionaire looks fit and smiles with the stars who joined Mr Zuckerberg at his home in Lake Tahoe, California. Though both the billionaires have not confirmed if the fight is taking place, their accepting each other’s challenge has created a buzz on social media.