International Boxing Federation (IBF) super middleweight champion Carl "The Cobra" Froch (29-2, 21 KOs) and challenger Yusaf Mack (31-4, 17 KOs) went face to face and promised to knock each other out on Saturday night, when they trade punches in Froch's hometown in Nottingham, England. IBF No.5-ranked Mack (31-4, 17 KOs) has been fighting as a light heavyweight for the past five years. He lost his lone world title shot to IBF 175-pound champion Tavoris Cloud by eighth-round technical knockout in 2006.