In a pair of tweets Sunday morning, the platform's owner said he was "lifting weights throughout the day, preparing for the fight," adding "all proceeds will go to charity for veterans."
RELATED: Elon Musk and Mark Zuckerberg say they're ready for a cage fight
Musk has not provided more details about the fight.
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In June, the two Big Tech billionaires seemingly agreed to participate in a cage fight. The stakes for the potential fight were raised last month when Zuckerberg's Meta launched a new Twitter competitor called Threads.
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Zuckerberg replied to Musk via Threads on Sunday afternoon, "Shouldn't we use a more reliable platform that can actually raise money for charity?"
He added: "I'm ready today. I suggested Aug 26 when (Musk) first challenged, but he hasn't confirmed. Not holding my breath."
Since Musk's takeover of Twitter in October 2022, policy pivots, technical issues, and the platform's stance on harassment and hate speech have given many users whiplash. When Threads was released, some saw it as a viable alternative that might unseat its rival, and the app saw enormous initial success. A lawyer representing Twitter even threatened a lawsuit over Threads.
CNN reached out to Twitter and Meta for comment but have not received a response.
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