Andriy Rudenko has pulled out of next month's European heavyweight title match against Dereck Chisora after sustaining an injury.
The Briton is now seeking a replacement opponent to defend his title against after the unbeaten Ukrainian damaged his Achilles in training.
"We're disappointed to hear Rudenko has suffered this serious injury and has to withdraw," said Chisora's promoter Frank Warren.
"It's very unfortunate but these things happen and we have to move on and secure Chisora a new challenger. We have some names that we are working on and will look to announce the name very shortly."
The match between Chisora and Rudenko was scheduled to take place at the Copper Box Arena in London on February 15.
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