The UFC 224 fight card gets stronger every day.

The UFC is targeting a matchup between women’s bantamweight champion Amanda Nunes and Raquel Pennington for the pay-per-view, two people with knowledge of the situation told MMAjunkie. They requested anonymity because the UFC has yet to make an official announcement, although one side already has agreed to the bout.

UFC 224 takes place May 12 at Jeunesse Arena in Rio de Janeiro. The event’s main card airs on pay-per-view following prelims on FS1 and UFC Fight Pass.

After lobbying for a superfight with women’s featherweight champ Cris Cyborg, Nunes (15-4 MMA, 8-1 UFC) will shift focus to the division she reigns. The fight with Pennington (9-5 MMA, 6-2 UFC) will be the third attempted defense of her bantamweight title in a win streak that stretches six fights. Most recently, Nunes outpointed Valentina Shevchenko by split decision in September at UFC 215, rebounding after a bout of sinusitis that scratched a headliner at UFC 213.

Pennington gets the ultimate opportunity on the strength of a four-fight winning streak capped by a dominant decision over ex-champ Miesha Tate in November 2016 at UFC 205. She previously was targeted for a bantamweight title shot against Nunes at UFC 219 but was sidelined in October after a vehicle accident.

After a few rounds in the media with Nunes, Cyborg also re-focused on her division, stepping up on short notice for a fight against Invicta FC bantamweight champ Yana Kunitskaya (10-3 MMA, 0-0 UFC) next week at UFC 222. Cyborg recently told FloCombat.com she planned to revisit a superfight with Nunes and welcomed a meeting this summer at UFC 226.

The current lineup for UFC 224 includes:

Champ Amanda Nunes vs. Raquel Pennington – for women’s bantamweight title Ronaldo Souza vs. Kelvin Gastelum Vitor Belfort vs. Lyoto Machida Nick Hein vs. Davi Ramos Ramazan Emeev vs. Alberto Mino Junior Albini vs. Aleksei Oliynyk Cezar Ferreira vs. Karl Roberson

For more on UFC 224, visit the UFC Rumors section of the site.