Alexander Gustafsson made UFC light heavyweight champion Jon "Bones" Jones look human in their last fight, narrowly losing a decision to the champ at UFC 165. Perhaps Gustafsson removed his aura of invincibility, because other challengers are vocally stepping to the sport's pound-for-pound top dog.

Jones is slated to face Glover Teixeira this Saturday, and while Vegas lists the champion as a 4-to-1 favorite, Glover's singing a completely different tune. There was no way I was going to be the betting favorite," Teixeira told MMAJunkie.com.

Jones requests extra testing, hints Glover uses PEDs

"In my own head, and that of my trainer's, I am the favorite. But it's no surprise that I'm not in the eyes of the fans."

He has reason to believe in himself-he is 5-0 in his UFC career, and will enter the octagon Saturday nursing a 20-fight winning streak. Despite his stellar record, he believes there is plenty to improve on within his game, some of which will be on display vs. Bones.

Gustafsson makes UFC 172 prediction

"I'll never give myself an A since I ask a lot from myself," Teixeira said. "Every fight has its rough spots, and I'm always looking for improve every facet. I may not be as young, but my experience makes up for it."

He also thinks that Jones is vulnerable in certain ways, which he didn't disclose, while giving the champion his due in terms of his place in MMA history. "There are always holes in anyone's game," Teixeira said. "Without a doubt Jon Jones is one of the greatest fighters in history, and, of course, we do see errors that we'll try to exploit.

"I've watched Jones' fights, but my trainers are the ones who come up with a strategy. Ultimately, I'm not one to spend too much time studying my opponent. I leave that up to my coaches."