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.
ACB merges the World Fighting Championship Akhmat and becomes Absolute Championship Akhmat on 18-11-28; Bagov defeats WFCA champion Khuseyn Khaliev on 19-09-27 in Moscow, RUS in a unification match; vacates in 20 upon moving up to the welterweight class.
Abdul-Aziz Abdulvakhabov [2]
2020-09-19
Moscow, RUS
Defeats Alexander Sarnavskiy; also defeats interim champion Mukhamed Kokov on 23-10-04.
