Britain's WBA bantamweight champion Jamie McDonnell has warned challenger Tomoki Kameda he is going to "smash him to bits" in their world title fight on Saturday.

"Let me tell Kamenda, Kameda, whatever your name is, I am going to absolutely smash you to bits. I genuinely believe that," the Yorkshire-born McDonnell said Thursday at a final news conference before the fight at State Farm Arena.

"I've won two world titles and I have come all the way out here (to the United States) and trained for 12 hard weeks. I ain't getting beat, trust me. Let me tell you, you're getting stopped."

Kameda, the youngest of the three Kameda boxing brothers, vacated his WBO bantamweight world title last month.

The move came days after the World Boxing Organization announced it would not authorize a proposed unification bout between Kameda and McDonnell.

The organization said it did not recognize McDonnell as the WBA champion, due to Juan Carlos Payano's status as "super" champion.

Kameda won a split decision against interim champion Alejandro Hernandez of Mexico to successfully defend his WBO title for the third time in their world unification bout in Chicago in November 2014.

He boasts an unbeaten record of 31-0 (19 knockouts), while McDonnell is (25-2-1, 12 KO).

"I want to have a good fight and build on it," Kameda, speaking in Spanish, said at the news conference.

"I'm unbeaten but the champion has two defeats. I am No. 1 in this weight class. I will beat him by knockout."