Wladimir Klitschko named the strongest knockout, with whom he had to fight

"He was very fast and the guy turned out to have very heavy hands. I've been boxing for 25 years and I've never met a fighter who hit as hard as Corrie Sanders," DAZN quoted Klitschko as saying.

Recall that in March 2003, Sanders knocked out Wladimir in the second round. A year later, Vitali Klitschko avenged his brother, and another 8 years later, the legendary South African tragically died.