Their first encounter was at UFC 117 and Chael Sonnen completely dominated the champion until the fifth round. With Silva on his back he threw up a triangle choke and forced the challenger, Sonnen, to tap.
It was announced following the fight that Anderson was fighting with an injured rib. Was this the reason that Chael out-struck him 320-64.
Check out the full video of the fight below, thanks to Yahoo! Sports.