Groundbreaking UFC champion Amanda Nunes retires after dominant title defense

Amanda Nunes announced her retirement from MMA after defeating Irene Aldana to retain her UFC bantamweight title.
Nunes is the first fighter to hold and defend two UFC titles and the promotion's first openly gay champion.
Nunes submitted Miesha Tate in 2016 to win the bantamweight title and knocked out Cris Cyborg in 2018 to claim the featherweight belt.
Nunes' wife Nina is pregnant with their second child, leading Nunes to focus on family over her fighting career.
The UFC may dissolve the women's featherweight division following Nunes' retirement, as she was instrumental in establishing the weight class.