Rising junior middleweight star Tim Tszyu has not taken kindly to some of the statements being made about him by some of the top boxers in the weight class.

Tszyu is the top rated contender under the World Boxing Organization, with a title shot looming against WBO world champion Brian Castano.

First, Tszyu will have to overcome an upcoming showdown with Takeshi Inoue at the Qudos Bank Arena on November 17.

Tszyu views Castano as a tougher challenge than WBC, IBF, WBA champion Jermell Charlo.

Castano had recently stated that he doesn't believe Tszyu had achieved enough to warrant a world title shot. He also jabbed Tszyu for his refusal to face anyone away from home soil.

“Yeah, once I start smacking him in the face he’s going to regret his words, I guess,” Tszyu said to the Sydney Morning Herald.

“That’s the thing. He’s on mandatory now, so he’s got no choice but to fight me. Look, Castano, he’s going to be a tough challenge. Charlo, I don’t rate Charlo. I never did. To fight for all the belts, you know what? I’d prefer winning each belt one by one, just like Canelo Alvarez did. You get to take out every champion and everyone that’s in the division instead of just one. So we’ll see how it goes.

“Castano is a tough competitor. He’s awkward, he’s tough. And Charlo’s just overrated. Charlo’s just in a world of his own. I thought Charlo was going to win, but in my eyes I think Castano won that fight. [Castano's] pressure and his awkwardness; he’s only small and he always makes it into his fight, so the aim is to make his fight into my fight."