Two-division world champion Guillermo Rigondeaux is gearing up for a very dangerous clash, which takes place on August 14th at the Dignity Health Sports Park in Carson, California.

Rigondeaux will challenge WBO bantamweight world champion John Riel Casimero in a Showtime televised main event.

The two-time Olympic gold medal winner has won three bouts in a row since suffering his sole career defeat at the hands of Vasiliy Lomachenko in 2017.

The fight with Lomachenko took place at the super featherweight limit of 130-pounds - which is well above Rigondeaux's natural fighting weight.

At 40-years-old, a loss to Casimero (30-4, 21 KOs) could be the end of the road for the Cuban boxer.

“It has been a very focused camp, and I have found inspiration watching the Olympics, and it has lit a spark in me. Winning two gold medals in my early years gives me added incentive to win this fight. I want to prove to the world that I am one of the best boxers ever, and that I have a lot left to give in this sport. I am confident that I am going to do that against the most avoided fighter in my weight class. Casimero is a dangerous fighter and a very powerful puncher, but I’m going to tame him with great boxing skills," Rigondeaux said.

“Training in Texas with Ronnie Shields has been great and our energy working together is fantastic. Ronnie has had a lot of world champions, and has a very professional boxing gym, with a lot of world champions and fighters who are competing at the highest level of the sport. I am motivated to work hard, not just to reach my own goals, but by all the young fighters in the gym who are driven and focused. The atmosphere has brought something new out of me.  I’m revived and feeling young again.”