On Saturday in Chicago Oleksandr Usyk (16-0, 12 KOs) will debut in the heavyweight division in the fight against Chazz Witherspoon (38-3, 29 KOs) but he wants to fight WBC champion Deontay Wilder (41-0-1, 40 KOs) .
"I challenge Wilder. I am ready to fight him in his hometown. He says I'm not a threat to him, so I'm ready to show him what I am. He did not even win a round with me, I am the best in the world," Usyk said.