Amir Khan says he will have no choice but to move up to welterweight if he successfully defends his WBA and IBF light-welterweight titles against Lamont Peterson.
Khan has been unable to secure bouts with WBO title holder Erik Morales or WBC champion Timothy Bradley.
“Maybe they’re scared. I don’t know,” said the 25-year-old.
“There is unfinished business but I can’t wait around because I’ve got other ambitions in my career.”
The Bolton fighter added: “I want to unify the belts and become undisputed, unified light-welterweight champion.
“I’ve tried but they just won’t take the fights. You can’t force them. At the end of the day I’d like to fight them and prove I’m the best.
“I think that’s the reason they’ve moved me to number one in the rankings, because they know that I’m the one who wants to fight but these guys don’t want to face me.”
A move to welterweight could see Khan meet the winner of a long-rumoured fight between WBO champion Manny Pacquiao and WBC belt holder Floyd Mayweather, which could finally happen next spring.
Prior to that, Shane Mosley, Victor Ortiz and Sheffield boxer Kell Brook may be targets for Khan.
“There are some real super-fights for me in that [welterweight] division that people will want to see” Khan said