Check out the following article courtesy of TATAME.com:

After losing his debut on UFC octagon, facing Forrest Griffin, Mauricio Shogun Rua will face today the surgery room. The Chute Boxe Athlete will make a right knee surgery. “I’ll do it today. I hurt in a couple of months training with my brother. My foot got stuck and when I turn my knee turned too”, said Shogun, that doesn’t know when he will return. “I don’t know yet when I’m will be back. I’ll make my recovering and come back to train making a stand up game at lest” comment.

Asked about Chute Boxe bad luck in last month, with the defeat of Murilo Ninja, Andre Dida, Fabio Silva, Helio Dipp and his own defeat, Shogun said “there is a fell teams in the world that can put five fighters to fight in the same week. We know ours mistakes and we’re going to correct then”, finalized Shogun.