The boxer, now 57, suffered a catastrophic brain injury during the bout in London in February 1995 and his sister Lisa has revealed he is only just started to recall the events of that night with any clarity.

She told Boxing News magazine: “We’ve been doing a treatment where Gerald’s taking testosterone and peptide, and this has caused some healing to his brain.

“So he’s started to improve some, to the point where he’s started to remember the fight.

“Really, he only remembered what I’ve told him over the last 30 years.

“He’ll ask me questions and, up until recently, it’s been what I’ve told him.

“But a couple of months ago, he started telling me what happened in the right, why he took a knee.”

And Gerald remembers his glittering career before his final fight.

Lisa confirmed: “Oh yeah, absolutely. He knows what he accomplished.”

Despite the long-term effects of the injury, including comprehension difficulties, Lisa insisted her brother is “very healthy” and doing well.

She said: “He’s still got his spirit. He makes me laugh. He’s still funny, he loves to talk. He’s very emotional and very warm.

“Then there are days when he’s mean and aggressive, because of the head injury, but for the most part he’s very loving and kind.

“We talk a lot. We have long conversations where he wants to know what’s going on with his kids and his six grandchildren. Gerald has three children.

“Gerald, I believe, will live a long time. Physically, he’s very healthy.”