Oleksandr Usyk dominates, stops Thabiso Mchunu to retain his cruiserweight title

By winning the belt in only his 10th professional fight, Usyk, the 2012 Olympic heavyweight gold medalist for Ukraine, broke the division record for fewest fights needed to win a world title, surpassing the mark held by Evander Holyfield, who won a cruiserweight world title in his 12th fight by outpointing Hall of Famer Dwight Muhammad Qawi in an epic 15-rounder in 1986.

http://www.espn.com/boxing/story/_/id/18299696/usyk-dominates-stops-mchunu-retain-cruiserweight-title