Timothy Bradley has said that Manny Pacquiao has made a "big mistake" in agreeing to fight him in Las Vegas on June 9.
The 28-year-old, unbeaten in 28 bouts, believes that the Filipino sees him as a stepping stone towards a fight with Floyd Mayweather Jnr.
Bradley also claimed that Freddy Roach is attempting to use Pacquiao to silence him about remarks he has made about stable-mate Amir Khan, whom he has described as a "fraud".
"They've made a big mistake in thinking they can use me as a stepping stone," Bradley told www.fightsaga.com.
"We're all human and so is Manny Pacquiao. He's not invincible. He's underestimating me. You can't try to make a statement with a fighter of my calibre.
"Pacquiao has made a big mistake by even taking this fight. Freddy's plan is going to backfire on him - I'll be the one making the statement."
The American will step up in weight to fight Pacquiao for his WBO strap, having last fought at welterweight against Luis Carlos Abregu in 2010.
Bradley: "Pacquiao is underestimating me"
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