From racingbase.com:

Wladimir Klitschko is due to fight Derek Chisora on the 11th December and William Hill make the Londoner 6/1 to cause an upset and claim the IBF, WBO and WBC World Heavyweight Titles. Hills are offering 40/1 for a drawn fight.
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If Chisora beats Wladimir, chances are, his next fight will be against the younger Klitschko brother, Vitali. Chisora is 20/1 to claim victories against both Klitschkos before the end of 2011.