Former WBA beltholder David Haye believes he will become world heavyweight champion once again. The former WBA champion retired in October after losing to unified king Wladimir Klitschko, whose older brother Vitali owns the WBC belt. London-born Haye, who moved up from cruiserweight to win the heavyweight crown against Nikolai Valuev in 2009, lost his title in a unification bout when he was beaten on points by Wladimir in July and announced his retirement three months later, on his 31st birthday.

Haye's camp is speaking to Team Klitschko about fighting Vitali in the summer, but the two sides are far apart on the terms.

"My people are talking loosely with Vitali's people and they have shown a keen interest in a potential fight," Haye told BBC Sport.

"I'm going to stay in shape if that call comes, and if it does come I will be heavyweight champion again. I've always trained to stay in shape and I train every day. If there is a fight that pops up - against Vitali or Wladimir - I'll be in shape and be ready to go to war and win back my old titles."

It's down to Vitali. He seems very keen to knock me out. Not only to fight me, but to do what his brother Wladimir couldn't do and put me on the canvas. It depends on how much he wants to put me on the canvas."