BARRY HEARN AT 70 Steve Davis winning that title in 1981 was our eureka moment ...we were two boys from council houses and we broke down so many barriers with our own episode of ON THE BUSES

manager of the stars. “Davis winning his first world title in 1981, without doubt, was the eureka moment,” he said.

“I had been telling the world for years this kid was going to be the greatest thing since sliced bread, and to be honest I didn’t have a clue if I would be able to back it up.

“When he sank that pink at the Crucible, for both of us it was a moment so quantum it defies description. It still gives me a lump in my throat now.

“We were two lads from council houses who found our way to the top table.

“My dad was a bus driver and Steve’s father also worked in a bus depot, and between us we broke down so many barriers with our own episode of On The Buses.”

For his next trick, Hearn steered Chris Eubank to 19 undefeated world title fights, although the run was punctuated by his biggest regret.

Michael Watson – also a guest at the 70th birthday bash – was left in a coma for 40 days after his harrowing rematch with Eubank at White Hart Lane in 1991. Hearn said: “Boxing has become a much safer sport since the night Michael was injured, but I would give my eye teeth to turn back the clock and for that night to turn out differently.

“I was there when he astounded doctors with the first twitch of his index finger. To see him walk again, six years later, was almost a miracle of biblical magnitude. Water into wine.”

He believes Joshua has the star quality to transcend sport and keep the family firm ticking over well into his septuagenarian years.

“Muhammad Ali was once the most recognised human being on the planet,” said Hearn. “AJ has the potential to match that. He could become the most iconic sportsman we’ve ever produced.”