Chisora is currently appealing the British Boxing Board of Control 's decision to strip him of his boxing licence .
Frank Warren has defended his decision to pit Dereck Chisora against David Haye in a heavyweight grudge match .
Dereck Chisora is currently appealing the British Boxing Board of Control 's decision to strip Dereck Chisora of Dereck Chisora 's boxing licence .
Frank Warren has defended his decision to pit Dereck Chisora against David Haye in a heavyweight grudge match .