Zelenoff trolls half of Hollywood. He went to Vegas and went straight to the Mayweather Gym, that's probably how he did it. Up there he did brag brag till he got under their skin and they've been ok with sparring to teach him a lesson. He did troll JEnna Shea not long ago, thinking he'd date her, spamming the shit out of her twitter and website, he's been thrown out of 7-8 Hollywood gyms for his behaviors and sucker punched our dear Andrew Hartley the same way he did sucker punch Mayweather but even worse, he did so while Andrew was pulling his pants on and claims a victory for that.
I am not sure how many but there are quite a few people who want t beat the shit off him because he always sucker punch/dirty talk and claim victory. This will end up very bad for him, I am sure that at some point somebody will clearly go overboard and send him to the hospital but it's clear that he has monomatic delusions or something similar. By the way, he also trolled Cassius Green, the guy who used to be in Moseley trainer and calls him now and then, met him in Hollywood and probably that Cassius didn't expect that guy to be a super moron when he gave him his phone number.