MMA star Kayla Harrison tells TMZ Sports she's 100% confident she could take Khabib Nurmagomedov in a judo match ... if he's man enough to step up!!!
Don't get it twisted, Kayla's not calling for a fist fight -- but if Khabib is down for a pure judo match, Kayla says she KNOWS she can win.
FYI, Harrison was a 2-time Olympic gold medalist (2012 and 2016 games) before making the switch to MMA. She's considered the most decorated American judo athlete of all time.
So, could she beat up some of the top guys in MMA?