One of Elon Musk’s sparring partners shared photos of their "impromptu training session" on Twitter Tuesday evening as the platform's executive prepares for his cage match with Meta’s Mark Zuckerberg.

"I did an impromptu training session with Elon Musk for a few hours yesterday," tweeted Lex Fridman, a scientist at the Massachusetts Institute of Technology.

Fridman shared two photos from the session. One appears to show the two of them grappling with Musk in side control attempting to isolate Fridman’s right arm. The other appears to show Musk completing a hip toss on the smaller Fridman.

"I'm extremely impressed with his strength, power, and skill, on the feet and on the ground," Fridman said, describing their session as "epic." He continued: "It's really inspiring to see Elon and Mark doing martial arts, but I think the world is served far better if they train martial arts but not fight in the cage."

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Zuckerberg, Musk in a photo illustration

Mark Zuckerberg and Elon Musk have agreed to a cage match, but a date has not yet been announced. (Getty Images)

The supportive Fridman added: "I'm there for them, no matter what."

"That was fun!" Musk commented on the photos.

The training session comes ahead of an unscheduled bout between Zuckerberg and Musk, who also agreed to begin training with UFC Hall of Famer George St-Pierre to prepare for the contest.

"I'm a huge fan of yours and it would be an absolute honor to help you and be your training partner for the challenge against Zuckerberg," tweeted GSP, who is widely considered to be one of the best all-time fighters in the UFC franchise.

Elon Musk with his hands raised

Elon Musk, who owns Twitter and SpaceX, previously admitted to not regularly exercising. (Gilbert Carrasquillo/GC Images)

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"Ok, let’s do it," Musk responded.

Georges St-Pierre

UFC legend Georges St-Pierre reached out to Elon Musk over Twitter and offered to train him ahead of his potential cage match with Mark Zuckerberg. (Getty Images)

"Did a practice round tonight with Lex Fridman," he added about an hour later.

Musk, who owns also SpaceX, previously admitted to not regularly working out, although he tweeted Friday that he previously trained in "judo, Kyokushin (full contact) & no rules streetfighting."

Zuckerberg has trained in Brazilian jiu-jitsu, a self-defense martial art, for more than a year and won an amateur tournament.

Mark Zuckerberg, Dana White

Mark Zuckerberg, founder and CEO of Facebook/Meta, poses with UFC president Dana White during the UFC Fight Night event at UFC APEX on Oct. 1, 2022, in Las Vegas. (Jeff Bottari/Zuffa LLC)

The idea for the cage match started on Twitter last Tuesday, June 20, when Musk and other users on the platform were discussing Meta and its development of a Twitter-like competitor.

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Musk then offered to settle the competition with Meta CEO Zuckerberg, who owns Facebook and Instagram, in a cage match.

The Zuck later accepted the challenge.

UFC President Dana White later confirmed the two billionaires were "absolutely dead serious" about a potential bout.

White told TMZ Sports the celebrity contest could be the "biggest fight ever in the history of the world."

"Bigger than anything that's ever been done," White continued. "It would break all pay-per-view records. These guys would raise hundreds of millions of dollars for charity. You don't have to be a fighting fan to be interested in this fight. Everybody would want to see it."

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He also said it could "triple" the revenue of the current biggest fight, which was between undefeated boxing standout Floyd Mayweather and former UFC Champion Conor McGregor.

Las Vegas Octagon

Musk suggested the bout take place in Las Vegas inside a UFC Octagon. (Chris Unger/Zuffa LLC via Getty Images)

"I just think it triples that. I think it triples what that did. There's no limit on what that thing can make," White predicted. "Everybody would watch it, everybody would want to see it."

Musk suggested the bout should take place in Las Vegas, inside a UFC Octagon, but no date has been set for the billionaire brawl.