Not every famous person has their best friend on their payroll. The three fighters you mentioned have been on shows like 24/7 numerous times so these best friends/staff members get plenty of air time. Golovkin hasn't had as much exposure in this respect so he hasn't had the opportunity to promote his friends and family as much, if that is even what he wants to do. Many don't. Just because some sports peoples friends are known doesn't mean that all are. My apologies for not grasping the concept of your post. I read too much into it as I really didn't expect to see a post asking, "Do you know who this famous persons best friend is?", as this is quite frankly a ridiculous question. Again, my appologies for thinking that your question wasn't as shallow as it clearly was.
But I might be the friend, and I could have said something to Hunter or just looked in his direction at some point, if not now, maybe in the future.
Hunter claiming he met Golovkin's best friend and exchanged those words is just as dumb as those who confidently claim he's lying and asking for proof in either direction. You can doubt or believe him. I, personally, don't believe IT. Hunter may have actually had that conversation with that guy; but Gennady's "best" friend? And why should we believe Hunter or his "he say she say"? Quit trolling and asking people to disprove rumors.