Ronda Rousey -- Called Out By Holly Holm's Camp ... YOU. WILL. LOSE.

The match was JUST announced ... and we've already got some good old fashioned smack talk in the Ronda Rousey vs. Holly Holm UFC fight ... courtesy of Holly's camp.

"We don't PLAN on taking Ronda's belt, we ARE taking her belt," Holly's agent Lenny Fresquez tells TMZ Sports.

Lenny has been a part of Holly's camp for years -- and worked extensively with her during her fighting career, before she joined the UFC.

And it's clear, the Holm camp didn't take the fight expecting their star to lose.

"I would like nothing else in the world than for [Ronda] to strike with Holly -- Holly is the best striker in the world."

Bold words, considering Ronda just K.O.'d Bethe Correia in 34 seconds courtesy of a punishing strike to the head.

"Holly isn't Bethe Correia," Lenny says ... "She's never seen a fighter like Holly. People don't realize how much bigger and stronger Holly is than Ronda. She cleaned out the boxing division at 130, 137 and 154."

That being said, here's video of Ronda training. Good luck ...