Cris Cyborg, the 40‑year‑old Brazilian striker, will defend her PFL women’s featherweight title in a retirement bout against former UFC bantamweight star Ketlen Vieira on Aug. 22 in Tampa. Cyborg comes in 29‑2, 1 NC, having captured the PFL belt in December by submitting Sara Collins. Her career totals 21 knockout victories.

The matchup marks the end of Cyborg’s storied 21‑year MMA run, which began in 2005 with a debut loss followed by 21 straight wins, including a 2009 first‑round KO of Gina Carano. After a 2017 UFC title reign and a 2018 loss to Amanda Nunes, Cyborg has straddled MMA and boxing, posting a 7‑0 pro record.

Vieira, 16‑5, has fought mainly at bantamweight, defeating former champions Holly Holm and Miesha Tate before leaving the UFC last May. She signed with PFL in February, announcing a new chapter on Instagram. The fight will decide whether Cyborg caps her legacy with a 30th win, a milestone no other female fighter has yet achieved.

Cyborg’s return after a brief hiatus—only one fight in each of the past five years—highlights her shift to professional boxing, where she remains undefeated. Her PFL victory over Collins marked only the second submission in her career, underscoring her reputation as a knockout artist. Fans expect a brutal, high‑stakes showdown that could cement her place among the sport’s all‑time greats.