Elon Musk practises with a UFC legend.

Given his obvious fitness and experience, UFC trainer Javier Mendez recently claimed that Mr. Zuckerberg will prevail in the bout.

"The big advantage Zuckerberg has over Elon is that he's actively training and he's more of a dog right now, because he entered a jiu-jitsu tournament, so that tells me a lot about him," the expert claimed.

When everything is taken into account, Zuckerberg is well ahead of Musk, but you won't truly know until you see what Musk has... Musk ought to consider strategies to stop takedowns, in my opinion. But you have to strike to escape a takedown; you can't merely try to avoid one.

The fight has not yet been given a time or location.