EXCLUSIVE A two-time Olympic gold medalist is doubling down on her challenge to Cris Cyborg … telling TMZ Sports she’s ready to run through 6 chicks to get a match with the UFC star!!! Remember, Kayla Harrison — a judo gold medalist in London (2012) and Rio (2016) — issued a challenge to Cyborg just last month … saying she wanted to beat the best to be the best. Now … she’s revealing her plan to make the fight actually happen. Kayla — who’s already 2-0 in her MMA career — tells us she’s gonna fight six more times in a Professional Fighters League tourney next year — where a million dollars for the winner is on the line. Harrison tells us once she gets done murdering them … she wants to get in a cage with Cris. “The greatest female fighter of all-time, Cris Cyborg — new, up-and-coming rising star, 8-0 — let’s meet,” Kayla said at the Buoniconti Fund’s 33rd Annual Great Sports Legends Dinner on Monday. “Let’s fight. Let’s see who’s really the best.” Unclear when Kayla’s first PFL match will be … but if she goes 6-0 over the course of next year — Cyborg’s been officially put on notice.