Claressa Shields: I want to be MMA world champion

Claressa Shields said on Monday that she will be MMA world champion. The 26-year-old described herself as 'Greatest Woman of All Time,'

A double Olympic gold medallist, world honours at light-middleweight, middleweight and super-middleweight and the first boxer - male or female - to be undisputed champion in two pisions in the four-belt era, Shields has done it all in the fight game.

"I'm number one," said Shields, who has won all 11 of her professional bouts. "You've never seen a fighter give me trouble. I go out there and school them."

Shields will make her MMA debut against fellow American Brittney Elkin, who has a record of six wins and three losses.

"I want to become a boxing world champ and simultaneously a mixed martial arts world champ," says Shields.

But despite that dream, she had very little experience of martial arts before she began training last year.

"I did a little bit of karate when I was younger but no wrestling, jiu-jitsu or anything like that," she says.

"One thing they do have in common is it's a fight. And everyone knows I like to fight more than any other woman in the world."