Wladimir Klitschko said he would not feel like a real heavyweight champion until he has unified at least two of the division's four belts.
Klitschko stopped Calvin Brock in the seventh round on Saturday
The Ukrainian made a successful first defence of his IBF crown against American Calvin Brock on Saturday.
But he said: "I do not consider myself as a real champion.
"Only the guy who will unify the titles will be respected. My goal is to get unification, and my goal is to get my next fight as a unification fight."
There has not been a heavyweight regarded as the undisputed champion since Lennox Lewis retired in February 2004.
Klitschko has set his sights on changing that and wants his next fight to be against one of the other three fighters who have a world championship belt.
"It doesn't matter with whom - (WBA champion Nikolai) Valuev, (WBO title holder) Shannon Briggs or (WBC champion Oleg) Maskaev," Klitschko said.
I wish to see a person who will hold all titles and who will be respected as the heavyweight champion
"I'm not interested in staying in the sport to just keep fighting. I am interested in unifying the titles. I think the heavyweight division needs a real champion."
Briggs turned up at Klitschko's post-fight news conference to challenge him to a bout.
Klitschko had been planning to fight Briggs instead of Brock, but a contractual disagreement ended hopes of a deal.
606 DEBATE: Can Klitschko achieve his unification goal?
"You were supposed to fight Shannon Briggs tonight," Briggs said. "But they chose to fight Calvin Brock. They got the result they wanted."
The heavyweight division is in such a haphazard condition that 44-year-old former champion Evander Holyfield is trying to regain the crown for a record fifth time.
And Lewis, now 41, has been reported as saying he would fight Klitchko if the money was right.
Klitschko said: "[Promoter] Don King promised to make a tournament and to get unification and I hope he will hold his promise.
"I'm ready to fight those champions in the next fight. Let's get a real heavyweight champion.
"I am a fan of boxing and I wish to see a person who will hold all titles and who will be respected as the heavyweight champion. Let's get it done."