By Sev Sarkisian: Boxing fans around the world will certainly be getting a treat this Cinco De Mayo with unified world middleweight world champion Gennady Golovkin (37-0 33KO’s) making his long-awaited return to the ring to face former U.S Olympian and longtime jr middleweight contender Vanes Martirosyan (36-3- 1 21KO’s).