The eighteenth Challengers episode is expected to take place on August 12, 2011 at the Palms Casino Resort in Las Vegas, Nevada.
Official fight card
Main card (Showtime)
Preliminary card
- Lightweight bout:
Jorge Gurgel vs.
Joe Duarte
- Middleweight bout:
Danillo Villefort vs.
Nate James
- Lightweight bout:
Pat Healy vs.
Eric Wisely
- Women's (145 lb) bout:
Ronda Rousey vs.
Sarah D'Alelio
- Light Heavyweight bout:
Roy Jones vs.
Derrick Mehmen
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