Mark Zuckerberg just posted a shirtless photo of himself training with two MMA legends. What started as Twitter jabs have turned into rumors of a cage fight between Zuck and Elon Musk. Neither tech billionaire has denied the possibility, instead broadcasting their MMA training. Need more evidence that Mark Zuckerberg has been feeling himself lately? This is serious business," Adesanya captioned the three-slide post, alluding to the chatter of a potential cage fight between him and Elon Musk.

---

Persons: Mark Zuckerberg, Elon Musk, Israel Adesanya, Alex Volkanovski, Mark, Adesanya, Volkanovski, Musk, George St, Pierre, Zuckerberg, Clive Mason, — Dana White Organizations: Zuck, Morning, UFC, Twitter, Getty Locations: Israel