Chris Eubank Sr has vowed to do everything he can to pull his son out of his projected catchweight bout with Conor Benn at the O2 Arena in London on 8 October.
Eubank Jr and Benn are scheduled to meet in a 157lb showdown three decades after the last of two famous meetings between their respective fathers.
But Eubank Sr has expressed concerns over the weight-making implications for his son, who has previously fought as high as super-middleweight, while Benn will effectively move up a division.
Eubank Sr said: "If he doesn't take my advice, then I have to put my foot down. He is coming down 1oz below 160lbs which cannot happen on my watch."
"My son is a warrior, he will fight anyone. But I told him, you cannot go beneath 160, and he's gone down to 157. It cannot happen. That is called suicide. I don't do that to my son. I'm not putting him in that field.
"I am managing my son's career. Irrespective of what he has said, irrespective of what he has written down and signed, it can't happen.
Alluding to the tragic death of another son, Sebastian, last year, Eubank Sr added: "This is modern day 'gladiating', this is not a plaything for the audience.
"We have to be strict, otherwise lives are put in danger and my son's life cannot be put in danger. I've already lost one - it can't happen again.
"If you have a child and someone's trying to actually take that child away from you, and do something wrong to that child, as a dad you wouldn't let them. That's all I'm doing."
