London, Oct 23 Brit Asian boxer Amir Khan can remember the exact time when he changed from a boy to a man as a boxer.

It was the 54th second of the fight when Colombian Breidis Prescott knocked him out cold last year.

That was Khan's only defeat and, as he looks ahead to his world light welterweight title date with Dmitriy Salita.

Khan, back in England from from Freddie Roach's Wild Card gym in LA, admitted to The Sun:

"The one thing I used to fear was defeat but I know what that is like now. After losing to Prescott I fear nothing and no man. Those 54 seconds most definitely changed me from a boy to a man. I realised after that defeat I was not the full package and I needed to put my foot down." (ANI)