Amir Khan insisted his world-title aspirations had been revived by his explosive two-round demolition of Oisin Fagan at the London ExCeL.

The Bolton star reacted to his crushing 54-second defeat to Breidis Prescott in September by claiming his 19th victim in 20 fights on Saturday night.

Brave Irishman Fagan was viewed as a durable opponent who would survive until the later rounds, but he never had the power to trouble Khan in a brutally one-sided contest.

A short right hook early in the first round spelt the beginning of the end as the impressive Khan began rebuilding his career.

“I knew what mistakes I made in my last fight but also knew I’d come back stronger,” said the Olympic silver medallist, who will next fight on February 21 or 28.

“I went over to train in Los Angeles with Freddie Roach and sparred with Manny Pacquiao and all the Mexicans at his gym.

“It was tough but I had to come back and prove to the critics that I’m not finished, that I made a mistake and that was it.

“My time will come and I feel like a fresh fighter now. I’ve already lost a fight so there’s nothing for me to be scared of.

“It’s now about winning a world title. I’m not one of those fighters who will hide or quit. I want to fight the best.”

Heading to Roach’s Wild Card Gym was a brave decision for the 21-year-old and the benefits after just six weeks in Hollywood were evident against Fagan.

Hands glued high to his temple, Khan moved his head and used the ring to make himself an elusive target.

Fagan was dropped by the right hook and then went down for a second time in the opening round amid a barrage of punches. Scenting an earlier than expected finish, Khan unloaded at will in the next round and referee Mickey Vann had seen enough after one minute and 37 seconds.

Fagan was given oxygen in his corner as he regained his senses, allowing Khan to reflect on the wisdom of his move to America.

“I’ll head back to Los Angeles in January for four to six weeks. Next time Freddie is going to come over and will be in my corner,” he said.

“I’ll always go to the States now. It lets me get away from the distractions. Being home is nice but you get pulled left, right and centre.

“In America all I do is box. Over there no one sees me as Amir Khan, no one cares about me. All the focus is on Manny Pacquiao, which takes the pressure off me.”

As one British Olympic medal winner was restoring his reputation, another was doing yet more damage to his as Audley Harrison lost a points decision to Martin Rogan.

The 37-year-old pawed with his jab and looked to hold whenever possible in a negative display that showed brief flashes of his undoubted ability. Belfast taxi driver Rogan, winner of the first Prizefighter, inflicted a fourth defeat in 27 fights on Harrison that should end his shaky world title ambitions.

Enzo Maccarinelli relaunched his mission to unite the cruiserweight division with a comprehensive victory over Matthew Ellis. The withdrawal of three opponents left the Welshman facing the Blackpool heavyweight, and it took just two rounds of vicious body shots to batter Ellis into submission.