Amir Khan is convinced his brutal defeat by Breidis Prescott will prove the turning point in a career that has now been rid of outside distractions.

The Olympic silver medalist meets Oisin Fagan at the London ExCeL on Saturday night in his first appearance since being annihilated in 54 seconds by little known Colombian puncher Prescott. Trainer Jorge Rubio was dismissed and the 22-year-old headed over to Los Angeles where he has spent six weeks under the watchful eye of the highly respected Freddie Roach.

Regular sparring sessions with ferocious Filipino Manny Pacquiao has honed his skills in the ring while the atmosphere in the Wildcard Boxing Gym also promoted a change in thinking. "Things happen for a reason. If I hadn't lost I wouldn't have met Freddie Roach and sparred with Manny," he said.

"Training in America was new for me but I loved it. I'll do it for every fight now. Now I'm living and sleeping boxing.

"There will be no appearances outside, no doing this or that. Now I'm turning that type of stuff down.

"In the UK I have the status of being a celebrity. Boxing has made me bigger but if I go to LA then not many people know who I am. I don't have any distractions."

Prescott confirmed suspicions over Khan's vulnerable chin in devastating fashion and his reaction should Fagan connect cleanly will be closely monitored.

But sparring with Pacquiao, possibly the best pound for pound fighter in the world, has strengthened his self-belief.

"It's been good because Manny has wanted to prove a point to me. I did really well against him - I wasn't battered once," he said.

"I don't think I lost a single session against him in the gym."