From the squared circle to the cage, Claressa Shields simply can't lose.
Shields made short work in her MMA debut of Brittney Elkin, and the two-time Olympic boxing gold medalist proved she might have a future in the sport with a TKO win on Thursday night in the main event of a Professional Fighters League card in Atlantic City.
She shook off a slow first two rounds before she got Elkin on the ground and needed a few heavy shots to cause the decisive damage. She earned the win with a right hand from the top at 1:44 of the third round.
"I feel like I am dreaming. This is crazy," she said.
Shields is 11-0 in boxing and has already won the light middleweight, middleweight and super middleweight crowns and become the fastest fighter in history - either male or female - to become a three-division world champion.
She only started her MMA training in December but her conditioning came into play, with the five-minute MMA rounds three more than a typical round in boxing.
"I just had a never quit attitude," Shields said.
CEO Peter Murray said Shields would fight one more time this year for PFL before a decision was made for 2022.
One potential dream match for 2022 in the PFL would have Shields fight Kayla Harrison. Harrison, a two-time Olympic judo gold medalist, has emerged as the face of PFL. Harrison (9-0) fights again on June 25.
Unlike other MMA organisations, the PFL uses a season format, with playoffs and a championship fight night that awards a $1 million prize for each of its six weight class champions. Four fighters each in PFL's featherweight and men's lightweight division advanced on Thursday.
Shields was billed as fighting in PFL's first showcase fight.