Speaking to Express Sport last month, the Brightonian revealed: “I guess I just didn’t feel I needed one.
“I had so much success throughout my entire career without one. I know myself as a fighter, I know how to get myself fit.
“But at this stage now I feel like I need to get a grasp of every opportunity, every advantage going into these world-level fights.
“Not having a trainer is basically just giving an edge to my opponent. And I’m not willing to do that anymore.”
Son of the maverick two-weight world champion, Eubank Jr has had the opportunities to work with top-class trainers before, though.
His father facilitated a working relationship with Booth, who has worked with names such as David Haye and George Groves.
It was roughly three years ago that Eubank Jr announced he’d teamed up with Booth, but the pair split without much coverage into why.
Speaking to iFL TV, Eubank Jr explained the situation.
“The reason it fell apart between me and Adam Booth… We had a sparring session down at my gym in Brighton,” he began.
“And Michael ‘Venom’ Page, he came down, and a few other sparring partners. Adam came down. And me and Michael sparred.
“Through my entire career I’ve always sparred three-minute rounds, 30 seconds’ rest. We did one round, me and Michael. And I said: ‘Alright, 30-second rest and we’re back in for the second round.’
“And Michael said: ‘No, it’s not. It’s a minute rest.’ Him and his trainer. His trainer was like: ‘No way, we’re doing 30-second rest – we’ll do a minute rest.’
“I said: ‘Well, it’s my gym, you’ve come down here to spar me so respect the rules of the gym and we’re going to do 30-second rests.’ And they were like: ‘No, we’re not doing that’.
“I said: ‘Alright, well there’s the door mate, my other sparring partner’s gonna jump in. Because that’s how I spar. It’s my gym, you’ve come down to work with me, so if you’re not happy with that you guys can leave.’
“So they did, he got out the ring, him and his trainer left. And Adam Booth left with them. He followed them out of the door and didn’t come back.
“A trainer is supposed to stick by their fighter, in my opinion. Even if I was wrong, which I don’t think I was, Adam should have stayed in the gym with me, not be upset because I chased away a sparring partner.
“Seeing him do that made me think: ‘OK, this isn’t the right guy for me. We’re obviously on two different levels.'”