Paige VanZant expressed her frustration with Bare Knuckle Fighting Championship's decision to postpone her upcoming clash with Charisa Sigala.
The former UFC star, 28, was due to face her fellow American in the co-main event of BKFC 27 in London on Saturday before they were removed from the event.
It's understood VanZant vs Sigala - which was due to take place at Wembley Arena - is currently in the works for October.
Fan favourite VanZant hasn't set foot inside the ring since her unanimous decision loss to Rachael Ostovich last July.
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And it seems she isn't too happy with her promoters after they randomly decided to pull the plug on her return to the squared circle at short notice.
VanZant wrote on Twitter: "This is out of my control!!! I went an entire camp and weight cut to be pulled a week out!!!!
"I did not pull from my fight!!!! I was pulled! I am p***ed off and heartbroken!
Paige VanZant's BareKnuckle Fighting Championship contract is said to be worth millions.
"I worked my f***ing a** off to be pulled a week before I am supposed to compete!!!!"
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VanZant's representatives were contacted for further comment but in the mean time it means her highly-anticipated UK debut will not take place as originally planned.
The 28-year-old, once seen as one of the top prospects in the UFC, had been gearing up for her return to the ring for what might have been the final time.
Paige VanZant in action
She told GiveMeSport.com: “I’ve put myself in a great position to be honest. I’ve been smart financially. I’ve put myself in a position where I get to spend my time doing what I want and that’s the true definition of wealth is being able to spend your time doing whatever you truly want to do with it and for me I want to fight.
“I like fighting, I like fighting in bareknuckle boxing, and it’s not to prove anything to anybody nor myself.
“I have nothing to prove, I’m just going out there and doing my thing, I want to be the best possible toughest person that I can and this is where I see my true value.
"BKFC is still a brand new sport and it’s a big learning curve and there’s not very many women who are willing to do something like this.
“They’re definitely gaining momentum, there’s a lot more females that are signing with the promotion, but it doesn’t take a lot of wins for you to be ranked in the top field.
“So I’m excited to go out there and fight again, you know.
“There’s a lot of people who will have one fight in bareknuckle boxing but there’s not a lot that will have two or more, and I’ve already got 10 rounds of bareknuckle boxing under my belt and I’m preparing for another fight.”