Golovkin is the super WBA champion, which is the highest in WBA hierarchy. Jacobs only owns WBA "Regular" belt, which is the same belt Chagaev has at heavyweight, or Braehmer at LHW. Golovkin cannot take WBA "Regular" belt from Jacobs, because if Golovkin beats him, that belt would just become vacant and another two contenders would fight for it, therefore someone else will be awarded WBA "Regular" champ. The belts table at the moment @ 160 is the following: WBA - Gennady Golovkin WBC - Saul Alvarez IBF - Gennady Golovkin WBO - Billy Joe Saunders