Meta’s CEO, Mark Zuckerberg, has said that his highly publicized mixed martial arts fight with competitor Elon Musk has been called off until the Tesla CEO gets serious about it.

The prospect of the fight was raised in June, when Musk proposed the fight against his fellow billionaire, social media CEO. Zuckerberg, who has been training with high-profile UFC fighters for two years, accepted.

The stakes quickly heightened, after Musk took to Twitter, which he has renamed “X,” to claim that the fight would be held in Italy, in an “epic location” surrounded by ancient Roman artifacts. The fight, he said, would be managed by his and Zuckerberg’s foundations, not the UFC.

Read: Tesla Investigated Elon Musk For Using Company Funds To Build Giant Glass House

 Mark Zuckerberg Calls Off MMA Fight With Elon Musk Until Tesla’s CEO “Gets Serious”

However, it seems that Musk’s imagination may have gotten away from him. Since making those big promises, the Tesla CEO changed his tune, refusing to pin down a date for the fight, claiming he needed back surgery, and then proposing a practice round in Zuckerberg’s backyard.

The Meta CEO referenced all of these factors in a message on Threads, in which he claimed that “Elon isn’t serious and it’s time to move on.” Although he said he was still open to a fight, he claimed he would “focus on competing with people who take the sport seriously.”

After Zuckerberg’s post on Threads, Musk took to his own social media platform to call the Meta CEO a “chicken.” He also threatened to “bang on his [Zuckerberg’s] door and demand a fight,” on X.

Billionaires! They’re just like us (when we were five-years-old).

The Meta CEO now says to assume anything Musk claims has not been agreed to by him, and that he will post if any progress on the fight is made.

 Mark Zuckerberg Calls Off MMA Fight With Elon Musk Until Tesla’s CEO “Gets Serious”