CompuBox takes a look at the oldest world champions in boxing. Several of the top fighters and biggest superstars in the sport are well above the age of 30 and some are already either close to, or beyond, the age of 40.
1. Bernard Hopkins (IBF light heavyweight) -- 48 years 275 days
2. Vitali Klitschko (WBC heavyweight) -- 42 years 89 days
3. Guillermo Jones (WBA cruiserweight in recess) -- 41 years 163 days
4. Sergio Martinez (WBC middleweight) -- 38 years 236 days
5. Omar Narvaez (WBO junior bantamweight) -- 38 years 97 days
6. Wladimir Klitschko (WBA/IBF/WBO/IBO heavyweight) -- 37 years 203 days
7. Floyd Mayweather Jr. (WBC/WBA junior middleweight, WBC welterweight) -- 36 years 232 days
8. Carl Froch (WBA/IBF super middleweight) -- 36 years 104 days
9. Adonis Stevenson (WBC light heavyweight) -- 36 years 22 days
10. Sakio Bika (WBC super middleweight) -- 34 years 179 days