By Edward Chaykovsky

WBA junior welterweight champion Amir Khan (25-1, 17 KOs) is looking to further squash the doubts about his chin. The British star has been trying to brush away the question marks about his chin since 2008, when he was knocked out in a single round by Breidis Prescott. On July 23 at the Mandalay Bay in Las Vegas, Khan will take part in a unification with IBF champion Zab Judah (41-6, 28 KOs).

Khan was able to do some damage control by winning a tough decision against Marcos Maidana in 2010. Khan's chin was tested when the hard punching Maidana had him in trouble and ready to go in the tenth round, but Khan held together until the final bell. Even with his performance against Maidana, Judah doesn't believe Khan is able to withstandhard punches to chin. Khan plans to make Judah a believer by fighting him on even terms in the ring.

"I had a Twitter war with Zab early in the camp. I was responding to what he was saying but then I thought I needed to be more professional, and just ignored it. He’s been trying to get into my mind. But I’ve had this since I was 17 years old, after winning the Olympic silver medal for Great Britain. People calling me out; calling me 'chinny’. They said I was treated like the golden child, but people can say what they want. I’ll just go out there and prove them wrong. Watch me," Khan told The Telegraph.