Olympic boxing champion Claressa Shields wins MMA debut by TKO

• Shields makes short work of Brittney Elkin in Atlantic City
• Boxing champ weathers early storm to emerge with win

Olympic boxing champion Claressa Shields made short work of Brittney Elkin, and the mixed martial arts novice proved she may have a future in the sport with a TKO win on Thursday night in the main event of a Professional Fighters League card.

I'm not losing this fight," the undefeated boxer said. I got myself going with those big right hands. My right hand has never failed me.