Yes but look what Lorenzo Fertitta said very recently, I think it was at the UFC 100 expo.
There’s a lot of great superfights out there, but teammates refuse to fight teammates, such as Anderson Silva vs. Lyoto Machida. What’s the UFC’s opinion about teammate vs. teammate fights?
Fertitta: Look, at the end of the day, we’re here to see fighters, we’re here to see fights. If teammates don’t want to fight, then they’re gonna have to go somewhere else. We don’t put up with that stuff.
I agree with him "friends" should be forced to fight each other. Unless it's family members like the ninja or shogun.