Heavyweight title challenger Kevin Johnson is showing WBC heavyweight champion Vitali Klitschko no respect in advance of their clash Saturday night in Bern, Switzerland. “He’s a joke,” said Johnson, “he’s a dream opponent, he’s a big, ugly zombie….Klitschko can’t do half of what I can do – either physically or mentally. F— that guy. I’ll leave him behind me. This fight is easy!” Klitschko, who stopped Chris Arreola in ten rounds three months ago in Los Angeles, promised to do better against Johnson. “It’ll be a classic KO,” he said.