Anthony Joshua marked out of 10 before Alexander Povetkin bout

Hearn swooped to sign Joshua off the back of his London 2012 success and has helped guide him to a point where his last three bouts have sold around 250,000 tickets.

“I can remember his first news conference. He was still very focused in a suit and waistcoat and for someone who didn’t really know a great deal of what was going on, you wouldn’t have thought it.

“Five years, I mean wow, it has been faultless really. It’s great as a promoter to know you have this guy who you don’t have to worry about.

“You don’t have to worry about him wanting to go out, wanting to give up boxing, wanting to spend money on stupid things, you just have a very focused disciplined fighter.

“It’s cringeworthy to say but he’s practically perfect. If I had to pick one thing, it would be more aggression at press conferences. You have these Instagram heavyweight champions of the world, the likes of Deontay Wilder, he would never behave like that and thinks it’s cringe.

“If I said to him ‘could you do a video pushing the pay per view or ticket sales’ I’ll get a reply saying ‘no, that’s cringe, I ain’t doing that’.

“For five years as a fighter to promote, I would have to give him a 10. What more could you do? He has unified the division after 21 fights.”