Hearn was filmed shoving Eubank’s promoter Ben Shalom during the melee on Tuesday, but Shalom said he had no idea his fighter planned to slap Benn with an egg.
Security rushed in to stop the situation from escalating further after a news conference that was full of insults about family rifts and failed drug tests.
The boxers continue their family rivalry after their fathers – Chris Eubank Sr and Nigel Benn – had two fights in the 1990s but a scheduled contest between the sons in October 2022 was called off after Benn failed a voluntary drugs test, prompting a two-year battle with anti-doping authorities, before his suspension was lifted in November.
Benn denied intentionally doping, but a report from sanctioning body the WBC suggested an overconsumption of eggs could have caused Benn’s two failed drug tests.
The British Boxing Board of Control said in a statement they were “aware of the incident” and “are dealing with the matter in accordance with its regulations”.
Steve Bunce, speaking on his 5 Live Boxing podcast, said there would definitely be “fine” for Eubank’s conduct.
“The premediated nature of the attack is not what I was a fan of,” Hearn said.
“We’ve done it before. Whether it’s Haye-Bellew, very volatile fights in the past. We keep them away.
“We can’t afford to keep them in distance of each other. Because as I say, it is attack on sight mentality [now for Benn].”
“I understand things can spill over,” Hearn added.
“But now we’ve just got to make sure they’re kept apart.
“We’ve got to be careful. But at the same time we’ve got to continue the build-up, have the press conference at Spurs and make sure camps are aware we do have a code of conduct we need to follow.”