Rolando "Rolly" Romero, 26-years-old. has promised to crush world champion Gervonta Davis when they battle on December 5 at the Staples Center in Los Angeles, California.

The two heated rivals will collide in the main event of a Showtime Pay-Per-View card.

Romero (14-0, 12 KOs) was in action back in July, when he battered and stopped veteran Anthony Yigit in seven rounds.

And Davis (25-0, 24 KOs), also 26, hit the ring one month earlier, when he moved up to junior welterweight and stopped unbeaten Mario Barrios in the eleventh round.

Both boxers are stablemates, promoted by Mayweather Promotions, but they have developed a deep rivalry since last year.

Romero has conducted the majority of the trash talking and continues, almost daily, to take shots at Davis on social media.

Both fighters are predicting a brutal knockout ending.

Romero feels confident that despite Davis having more experience he will go down hard in the bout.

He feels his size advantage, and his own punching power, will propel him to a career-defining victory.

"Tank's gonna knocked the f--- out. And, whoever believes otherwise can go f--- themselves," Romero said to TMZ Sports.

"The best thing about Tank is that he's a puncher, and I'm a bigger puncher and bigger person. What the f--- does he have?

"I punch way harder than him. Ask anyone that knows us both. They'll tell you straight up. I'm gonna knock him the f--- out. [I'll do it in] one round. He's gonna run into something."