UFC 104 Lyoto Machida vs Mauricio “Shogun” Rua
The UFC 104 main event saw undefeated champion Lyoto Machida, who has never lost a round in the UFC, take on Mauricio “Shogun” Rua, who became the first guy to give the champion problems and in the eyes of the crowd, UFC president Dana White and most people watching, he should have won the decision. After 5 hard fought rounds where Rua delivered heavy leg and body kicks to the champion, all 3 judges scored it for the champion and Lyoto Machida remained undefeated and kept his belt. In the post fight press conference, Dana White said a rematch will be worked out.
Here is Lyoto Machida before the fight talking about why he will beat Rua, I do not believe he mentions bad judging.