Kayla Harrison is an undefeated MMA fighter with 2 Olympic gold medals, but the PFL star admits cage fighting is SCARY, and says that's why she isn't underestimating her next opponent ... despite being a huge favorite.
TMZ Sports- talked to the 30-year-old, 8-0 fighter weeks before she attempts to win the Professional Fighters League million-dollar tournament for the 3rd straight time!!
Harrison is a massive favorite heading into her May 6 fight with 26-year-old Mariana Morais ... but don't make the mistake of asking Kayla (like we did) if it's hard to get motivated to fight the 16-10 journeyman when everyone expects her to easily win.