Smart move by GSP, he career is still very young. He most likely will lose to Anderson, and he has a lot more to lose than Anderson does. Anderson could lose that fight, then retire and still be known as the best ever. GSP, with a loss with devalue not only his own worth but that of the entire WW division in a way. We all know weight classes exist for a reason, no need to accentuate it.
Gilbert Milendez - Anthony Pettis
Carlos Condit - Erick Silva
Anderson Silva - Mike Bisping
Lyoto Machida - Jon Jones
Alistair Overeen - Junior Dos Santos