Following the name of the champion(s): Indicates the number of times the competitor has held that title at that point.
[...]
Indicates a gap in the listing where title changes are not known.
<
Title was held or changed hands no later than this. In these cases, it is known that a competitor held the title at a certain time but not when he/she won it.
@
Order uncertain. Different titleholders may be known for the same year, for example, but it is not known who held the title before whom.
#
Unofficial or disputable claims. These are usually matches that certainly took place, but where there is doubt that the competitor shown should be recognized as a true title holder. These listings are also italicized.
Wins IBO, WBA Super, IBF, and WBO world titles; stripped of IBF title on 15-12-08; vacates other titles on 16-10-12 after cancelling his rematch with Wladimir Klitschko for the second time due to depression after a positive test for cocaine.
Wins IBO, WBA Super, IBF, and WBO world titles; also wins WBC World Title on 24-05-18; vacates IBF title on 24-06-26; again wins IBF title on 25-07-19.
