Marina Rodriguez is heading to the Octagon…

The 34-year-old Brazilian mixed martial artist will face off against Michelle Waterson in the UFC Fight Night headliner on Saturday in Las Vegas.

The originally scheduled main event between former bantamweight champion TJ Dillashaw and top contender Cory Sandhagen was postponed last week due to a Dillashaw injury.

Rodriguez and Waterson are both top strawweights, but the bout will be contested a division up at flyweight due to the short-notice nature of the situation. The bout will still be five rounds, like typical UFC main events.

ESPN has Rodriguez ranked No. 6 in the world at strawweight; Waterson comes in at No. 9.

Rodriguez (13-1-2) has just one loss in six UFC appearances. She is coming off a second-round TKO win over prospect Amanda Ribas in January.

Rodriguez has lost just once in her career, to former UFC women’s strawweight champion Carla Esparza in a split decision last July.

Waterson (18-8) is one of the most well-known women’s fighters in mixed martial arts. Nicknamed “The Karate Hottie,” the New Mexico resident is coming off a split decision win over Angela Hill last September. Waterson has won four of her past six bouts with the only losses coming against Esparza and Joanna Jedrzejczyk, another former UFC champion.