One of the things that makes the UFC 92 heavyweight title fight between Frank Mir and Antonio Rodrigo Nogueira so interesting is that Mir is known for finishing fights very quickly (he needed just 90 seconds to beat Brock Lesnar, and that wasn't even one of his five fastest finishes), while Nogueira is known for being impossible to finish (he's 31-4-1, with all four losses by decision).
In the above video, Nogueira talks about the importance of what he believes is his superior conditioning.
"I'm going to attack him all the time," Nogueira said. "I think he's more dangerous in the first three minutes of the fight and then he's going to lose his endurance. That's the way I'm going to finish the fight. Most of his fights, after five minutes, four minutes, his endurance goes down. ... I'm in better shape."
Interestingly, when I interviewed Mir a couple of weeks ago, he basically agreed with Nogueira's assessment: He said he doesn't think he'll be able to finish Nogueira. But he also said he's in great shape, and he expects a 25-minute war. We'll find out in a week.