Sven Ottke is a professional boxer who was the third European boxer to retire as an undefeated world champion, following in the footsteps of what English boxer?
Sven Ottke Sven Ottke (born 3 June 1967) is a German former professional boxer who competed from 1997 to 2004. He was a unified super-middleweight world champion, having held the IBF title from 1998 to 2004, and the WBA (Super) title from 2003 to 2004. He made 21 successful title defences, and was the third European boxer to retire as an undefeated world champion, after Terry Marsh and Michael Loewe; Joe Calzaghe later became the fourth. As an amateur, Ottke won a bronze medal in the middleweight division at the 1989 World Championships.
Joe Calzaghe Joseph William Calzaghe, {'1': ", '2': ", '3': ", '4': "} ( ; born 23 March 1972) is a Welsh former professional boxer who competed from 1993 to 2008. He is a two-weight world champion, having held the unified WBA (Super), WBC, IBF, WBO, "Ring" magazine, and lineal super-middleweight titles, as well as the "Ring" light-heavyweight title. Calzaghe is the longest-reigning super-middleweight world champion in boxing history, having held the WBO title for over 10 years and making 21 successful defences before moving up to light-heavyweight. As his super-middleweight and light-heavyweight reigns overlapped, he retired with the longest continual time as world champion of any active fighter.