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The Brangelina breakup ain't fazing Anastasia Yankova ... 'cause the Bellator fighter and model says she goes for guys a lot tougher than Brad Pitt.

TMZ Sports spoke to Anastasia about being a rising star in MMA (she's currently 4-0) ... as well as how it affects her dating life.

"Do you see me? My nose is broken. My ear is broken," Yankova says. "Guys like Brad Pitt don't understand what happened because I'm crazy (to) a normal guy."

FYI -- Anastasia just handled Veta Arteaga at Bellator 161 last week, which explains the black eye.