Oleksandr Usyk explains how Wladimir Klitschko helped him improve as a boxer
Usyk has explained the role Klitschko has during the early stages of his career, helping him defend heavier punches as he plotted his way to the heavyweight division
Usyk has explained the role Klitschko has during the early stages of his career, helping him defend heavier punches as he plotted his way to the heavyweight division