Did the headline catch you a little off-guard?
Good, that was the point.
During a training session in New Mexico at Jackson-Wink MMA, Rose Namajunas and Jon Jones got in a little work.
And despite the significant weight-difference, Namajunas held her own. Well, maybe not.
Check out the video below to see what happened when Namajunas, who meets Tecia Torres later this year, tried to secure a submission on Jones, who faces Daniel Cormier for the title in April.