Two UFC world champions trained with Mark Zuckerberg

Speculation over a possible Mark Zuckerberg vs. Elon Musk mega fight has been taken up a notch.

The Meta CEO was photographed shirtless alongside UFC middleweight champion Israel Adesanya and UFC featherweight titleholder Alexander Volkanovski, seemingly after a mixed martial arts training session Tuesday.

And, well, were Adesanya and Volkanovski impressed?

From the sound of it, yes, as Adesanya posted about the session on Instagram, saying: "No fugazi with Mark. This is Serious Business‼️"

Zuckerberg commented within the post: "It's an honor to train with you guys!"

The post generated over 1.8 million likes.

Things are moving fast for Zuckerberg in MMA. This training session follows UFC heavyweight champion Jon Jones already offering his services to train the technology billionaire last week.

That followed UFC legend Georges St-Pierre offering to coach Musk.