WBO champion for 8 years, made 17 defences and only lost when past his best at the age of 37. Plus were all the other fighters at Lightweight scared to travel to Germany to face him because he was that good? And as we all know, only special fighters can make multiple home defences of the prestigious WBO belt.
He was actually very good early in his title reign...but a combined 400+ am and pro fights caught up and saw him a fall off a tad sharply post 2000..I mean he was completely done by Popo.