Unified WBC, WBA and IBF world champion Jermell Charlo left no doubt this time around, stopping now former WBO champion Brian Castano in the tenth round to become undisputed on Saturday night at the Dignity Health Sports Park in Carson, California.

“I showed the fans, I showed these haters I can stand there and trade,” said Charlo “One thing I changed up is try not to be on the ropes too much … place shots on really precise parts on the body and wear him out.”

The first six rounds were frantic with back and forth action, Castano applying pressure to land heavy blows on Charlo who looked sapped of energy but in the seventh Charlo came out looking refreshed, outboxing Castano with the Argentinian unable to match the intensity.

Both fighters exchanged heavy leather in the tenth but it was Charlo who landed an uppercut to stun Castano before a left hook dropped him to the canvas. Somehow Castano was allowed to continue by the referee but it was just a temporary stay of execution as Charlo unloaded to put the full stop to the contest, crowning himself the undisputed king of the division.

“He was smarter this time,” said Castano, 32. “I felt that I won the first fight but tonight he caught me and that was it. … I feel like I still have a lot to give in boxing. … I’m happy with my performance despite the loss. I feel like there’s big room for corrections and improvements with my boxing.”