"Yeah, there was hesitation, to be honest with you," Munoz told MMAjunkie.com. "There was hesitation in taking it. It was crazy, but at the same time, it's competition, and it's what we signed up to do.
" ... It was very abrupt. From being a training partner to a friend to fighting each other, I'm all about it, but at least give me a little time. But for me, it's a fight, and I'm going to go out there and do it."
Munoz says he has fought friends before in the past, and done just fine. With that said, he has no problem taking on Machida.
"I've fought friends before, and I've done well in those lights," said Munoz, who meets Machida at Phones 4u Arena in Manchester, England. "You've got to be able to put the friendship aside for about 25 minutes and then pick it back up when it's done."
Munoz feels that a win over Machida would put him in prime position for a shot at the UFC's middleweight title.
"I think with Machida going down to middleweight, being a former champion and fighting me, he definitely has a way to fight for a title," he said. "But that's only if he gets by me.
"So I truly believe we both have a shot at a title after this fight."
Munoz concluded by saying he has some tricks up his sleeve to get the victory over Machida.
"I've got some things in my arsenal I'm going to do, and the advantage for me is I've trained with him," Munoz noted. "That's definitely an advantage for me."
Munoz is quite familiar with Machida's counter-punching style, so he knows to be careful when going in for the knockout blow.
"That's why I said there are endless combinations you've got to do," he said. "You can't just unconsciously, like, go in for the kill. If you do that – Ryan Bader got knocked out, and Tito (Ortiz) got kneed. It's like going into wood-chipper, like Mike Goldberg said. You can't just go haphazardly in.