- London Olympics 2012
Audley compares Joshua to Foreman
Super-heavyweight Joshua is being discussed as one of Britain's potential medal winners at the Games, having picked up silver at the World Championships in Baku last year.
On his way to the final, Joshua proved his quality by defeating the Olympic and two-time world champion Roberto Cammarelle.
And Harrison, who left the Sydney Games with gold around his neck in 2000, feels the sky is the limit for a youngster who reminds him of George Foreman.
"My advice to Anthony Joshua is to forget all of what might come afterwards, focus on the medal," Harrison told ESPN. "Not on the gold, [even though] that's what you're there for, focus on the process and the technical stuff needed to get there. That's what I'm relaying to them.
"The guy is 22 years of age and looks like George Foreman - a naturally gifted athlete. You don't see that every day of the week, a guy who looks and can perform like that, at that speed. It's exciting to have that. I'm excited about Anthony Joshua."