Norma Dumont's rivalry with Ailin Perez goes way beyond the Octagon.

Dumont (13-3) and Perez (13-2) are set to meet in a UFC bantamweight bout at UFC Vegas 121 on Sept. 26 at Meta Apex in Las Vegas. There is serious bad blood between the two leading up to the fight.

The Source of the Bad Blood

Perez posted a video last month accusing Dumont's boyfriend, UFC middleweight Marco Tulio, of checking her out while training at the UFC Performance Institute. While Dumont understands Perez's style of mental warfare, she vows not to be affected.

The Brazilian plans to stay unfazed by Perez's gimmicks and focus on letting her fists do the work this weekend. Dumont is just glad to have the opportunity to legally beat up someone she truly hates.

"It's a fight that literally has a personal anger, a personal issue, that the two of us have against each other," Dumont told MMA Fighting. "It's a fight that we're going to deliver a lot. I'm excited, I really want it. I think it's going to be fun."

"She Has Mental Problems"

Dumont admits that she has a personal grudge against Perez. She says Perez has filmed her without permission several times and also claims that the Argentine has been tagging Tulio in so many of her posts that he had to block her.

"She's already secretly filmed me three times," Dumont added. "She loves doing that. She has mental problems. This girl really has mental problems. When I saw the video, I looked at it and this isn't the first time she's done this before. She had already tagged him in her stories, so much so that he blocked her specifically so she would stop tagging him in things. She has this little game of trying to get people worked up."

"But, honestly, it's very insignificant, so it makes absolutely no difference to me. Ever since she signed the contract, I'm going to focus on beating her on the 26th. I don't need to fall for her bait or play along with the little things she likes to do. Now that the contract is signed, I already have my date to beat her; I have my time to do what I need to do, what I want to do without getting arrested, so it makes absolutely no difference to me what she does outside of the fight."

What's at Stake

Dumont is coming off a decision loss against Joselyne Edwards that snapped a six-fight winning streak. Meanwhile, Perez is riding a six-fight winning streak since suffering a submission loss in her UFC debut in 2022.