UFC world champion Amanda Nunes is looking for her biggest career payday in a potential clash with multi-division champion Claressa Shields.

Shields was ringside on Saturday night in Las Vegas, and watched Nunes retain her bantamweight title with a five round unanimous decision over Germaine de Randamie as part of the UFC 245 pay-per-view event.

UFC President Dana White is interested in making the fight a reality in 2020.

After five defenses of her title since winning it in 2016, Nunes is looking for the biggest possible challenge of her career. She's beaten a who's who of female stars that UFC had to offer - including Ronda Rousey, Meisha Tate, Holly Holm and Cris Cyborg.

Back in 2017, UFC superstar Conor McGregor crossed over to the boxing ring, and faced five division champion Floyd Mayweather. Their contest generated the second highest pay-per-view buyrate in the history of combat sports.

And Nunes wants to secure proper payment for such a crossover event.  

“A million? (I want to get) more than that,” Nunes said to reporters.

But Nunes is not looking to fight in a boxing ring - she wants to face Shields in MMA. Shields has expressed interest in crossing over to mixed martial arts.

“I’m an MMA fighter, why does she want to take me away from my sport? If she wants to fight me, come into my world,” Nunes said.

“I respect her as a boxer but I’m an MMA fighter. I don’t like to fight in boxing. I like MMA. I like what I did today. If she can handle that for five rounds, come see me. She wants to see me? I’m gonna wrestle the sh-t out of you and finish you with jiu-jitsu submissions. I want to see how she’s gonna feel (about) that."