June 25 (UPI) -- MMA legend Cris Cyborg will battle Ketlen Vieira and defend her PFA featherweight title in a retirement bout Aug 22 in Tampa, Fla., she announced. The bout will be held at Benchmark International Arena. "Looking for career win number 30," Cyborg wrote Wednesday on Instagram. "No other female in MMA has 30 career victories." Cyborg, 40, beat previously undefeated foe Sara Collins for the PFL crown on Dec. 13 in Decines-Charpieu, France. She owns a career 29-2-0, with a no

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