By Mark Vester

During a press conference held earlier today in Ukraine, WBC heavyweight champion Vitali Klitschko refused to give an definite answer on whether or not he will continue with his boxing career.

"Whether or not I am going to continue my sports career - I am not ready to give a definite answer. There must be a motivation in any business, a motivation for further fights," Klitschko said.

The WBC has ordered him to face mandatory Juan Carlos Gomez within 90-days, but he doesn't appear to be interested in facing him. He said opponents like Gomez and David Haye do not motivate him enough. There are two fights that would motivate him, a rematch with Lennox Lewis and a fight with seven-foot WBA heavyweight champion Nikolai Valuev.

"If I defend the title, these fights must cause a drive, give motivation to prove that you are the strongest," Klitschko. "If Lennox Lewis makes this decision [to fight], with all of my pleasure I will give this opportunity to Lewis, to myself, and millions of spectators, to give an answer to this question," Klitschko said.

"There is only one belt left, which is with Nikolai Valuev. I think a fight against Valuev could be the only interesting one, apart from the fight against Lewis."

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