Elon Musk has been pictured hitting the practice mats with a popular Brazilian jiu jitsu black belt ahead of what could be a bizarre blockbuster bout against Facebook founder Mark Zuckerberg.

Despite some pushback from the public, Musk has commenced training for his MMA cage-fight contest with fellow billionaire media mogul Zuckerberg, taking part in a training session with black-belt podcaster Lex Fridman.

Fridman, who has also trained with Zuckerberg, said he was ‘extremely impressed’ with Musk’s ability – but he would prefer if the pair didn’t end up trading blows.