AMIR KHAN is fully focused on becoming a world champion again now he is only fighting opponents and not the scales.

      

The former world light-welterweight champion has stepped up to welterweight after years of battling to make the 10st limit.

Khan, 27, faces big-hitting southpaw Luis Collazo on Saturday May 3 on the undercard of Floyd Mayweather's latest outing against Marcos Maidana in Las Vegas.

He is looking to get his career back on track after surrendering his light-welterweight world titles to Lamont Peterson and Danny Garcia in the last three years.

And the Bolton fighter is confident he is big enough to be a dominant force at 10st 7lb now he does not have two battles on his hands.

Khan said: "​It is my first fight at 147lb so I'm excited and I feel much more better at this weight because I remember when I used to make 140 in the light welterweight division.

 

   

"I used to be at least 12 to 15 pounds over a week or two before the fight and it was just too much weight I used to lose.
"I mean I used to look at myself in the mirror and just think to myself, 'How am I going to lose that weight?'.
"And to put that stress back in my body again and put that weight back on, it was just impossible.
"So, that's why we decided to move up to 147.
"I think I'll be a much better fighter when you're not killing yourself and making weight."
Khan believes he should have made the move a long time ago after seeing two opponents he beat - Maidana and Paulie Malignaggi - both win world titles at welterweight in recent years.
He added: "I think I'm the only guy left who was at that weight for such a long time.
"I think if you look at the success the other fighters have had—Maidana and Malignaggi —they've had a lot of success becoming world champions at the 147 division.
"I think definitely I'll be much more happier at this weight and I'll be much more stronger as well."
Khan vs. Collazo is live on BoxNation (Sky 437/490HD & Virgin 546) next Saturday night. Visit www.boxnation.com to subscribe.