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The greatest female mixed martial artist in history will have to wait a bit longer to defend her crown. Amanda Nunes' planned women's bantamweight championship defense against Julianna Pena has been forced off the UFC 265 card after Nunes tested positive for COVID 19, according to multiple reports.

Nunes vs. Pena was set to be the co-main event on the card, with Derrick Lewis vs. Ciryl Gane for the interim heavyweight championship serving as the main event from Houston.

Nunes holds both the UFC women's bantamweight and featherweight championship, both won on a 12-fight winning streak that ranks as arguably the most impressive run in MMA history, male or female. During her run, Nunes has scored wins over Ronda Rousey, Cris Cyborg, Miesha Tate, Holly Holm and every other woman to hold either championship in addition to two wins over dominant flyweight champion Valentina Shevchenko.

Pena was a big underdog heading into the fight, coming off a win over Sara McMann to get back in the win column after suffering a submission loss to Germaine de Randamie, a fighter twice defeated by Nunes. Pena holds a 2-2 record since 2017.

UFC chief business officer Hunter Campbell told ESPN that the fight would be delayed until Nunes was recovered and ready to compete.