David Nyika is finding out that the more you learn, the more you realise perhaps you don't know as much as you think you do.
After a stunning amateur career including two Commonwealth Games gold medals and an Olympic bronze, Nyika has made his move to the professional realm, with his second professional bout against Frenchman Anthony Carpin (5-6-2) this Sunday (NZT) in Manchester.
Opening up the pay-per-view portion of the card for Joseph Parker's rematch against Derek Chisora, Nyika has been training with Parker, Andy Lee and Tyson Fury in Morecambe, soaking up as much knowledge as he can.
As it turns out, there's a lot he didn't know about this game.
"When I talk to Tyson Fury, he's very adamant that there's a massive difference between amateur and professional boxing, so it became apparent very quickly. Every sparring with some of the professionals, I realised this is a different sport, and I think I was a little bit too sure of myself maybe," Nyika says.