Video: Could these two world champion wrestlers be Ronda Rousey's downfall?

Helen Maroulis and Adeline Gray

LAS VEGAS – As UFC women’s bantamweight champion Ronda Rousey continues to destroy challengers at an alarming rate, what’s it going to take for someone to beat her? How about world championship-level wrestling?

The United World Wrestling Championships currently are being held in Las Vegas, with today serving as the final day of competition. Already, champions have been crowned in 20 different weight classes. Among those were a pair of American women who brought home gold medals.

On Thursday, Helen Maroulis earned a world title at 55 kilograms (121 pounds), while Adeline Gray earned her championship at 75 kilograms (165 pounds).

Meanwhile, Friday saw Leigh Jaynes take home a bronze medal in the division closest to Rousey’s UFC fighting weight, 60 kilograms (132 pounds).

After their wins, both Maroulis and Gray expressed their desire to continue to build the status of women’s athletics – including wrestling – in the U.S. Both could make great strides in that department should they also earn gold medals at next year’s 2016 Summer Olympics in Rio de Janeiro.

Should any of these women earn Olympic gold, an invitation to compete in MMA would certainly follow. Will any of them take it? And could any of them be the one that finally downs the “Rowdy” UFC champ? Time will tell.

Rousey (12-0 MMA, 6-0 UFC) is currently scheduled to defend her belt next against Holly Holm (9-0 MMA, 2-0 UFC) at UFC 193, which takes place Nov. 15 at Etihad Stadium in Melbourne, Victoria, Australia. Due to the time difference, the event airs on Nov. 14 in the U.S. with a main card on pay-per-view.

For more on UFC 193, check out the UFC Rumors section of the site.