Two-division world champion Guillermo Rigondeaux has promised to put on a showcase when he challenges WBO bantamweight world champion John Riel Casimero.

The fight will take place on Saturday, August 14, from Dignity Health Sports Park in Carson, California.

Last year, Rigondeaux (20-1, 13 KOs) moved down in weight and captured a WBA "regular" bantamweight title when faced Liborio Solis.

A two-time Olympic gold medal winner, Rigondeaux is looking to secure more gold in his new weight class.

A few weeks ago, Casimero was all set to face WBC champion Nonito Donaire in a unification clash. 

But the fight fell apart when the fighters and their respective teams began to trade harsh words on social media.

Rigondeaux, who was originally scheduled to face Casimero, was very quick to reclaim his position in the Showtime televised main event. 

He's very confident in his ability to outbox Casimero - and the Cuban stylist is not ruling out the possibility of a knockout win.

“This is a big fight for me and my team because we have a chance to win that WBO title,” said Rigondeaux.

“Fighting on Showtime once again is going to be fun and I’m grateful for the opportunity. Although I’ve been out of the ring for well over a year, I’m still in great shape and have plans to ruin Casimero’s dreams. I know he has a lot of power, but he’s fighting a man with excellent boxing skills and a high ring IQ.

"I’m going to box circles around Casimero and show him what ‘El Chacal’ is all about.  My trainer Ronnie Shields, and I have been working on some new tricks, so don’t be surprised if I knock him out.”