Frank Warren promoter of Dereck Chisora talks with Adam Booth, trainer and Manager of David Haye after the Press Conference at Upton Park, London.

Dereck Chisora talks to BBC Radio 5l Live and reporter Mike Costello during the Press Conference at Upton Park, London.

David Haye poses for photographers after the Press Conference at Upton Park, London.

General view of the Press Conference at Upton Park, London.

Dereck Chisora talks to BBC Radio 5 Live during the Press Conference at Upton Park, London.

Dereck Chisora poses for the photographer after the Press Conference at Upton Park, London.

Promoter Frank Warren during the Press Conference at Upton Park, London.

David Haye (left) and Dereck Chisora (right) during the Press Conference at Upton Park, London. PRESS ASSOCIATION Photo. Picture date: Tuesday May 8, 2012. Photo credit should read: Nick Potts/PA Wire

Dereck Chisora poses for photographers after the Press Conference at Upton Park, London.

Promoter Frank Warren with Dereck Chisora (right) during the Press Conference at Upton Park, London.

David Haye (left) and Dereck Chisora (right) during the Press Conference at Upton Park, London. PRESS ASSOCIATION Photo. Picture date: Tuesday May 8, 2012. Photo credit should read: Nick Potts/PA Wire

David Haye arrives with bodyguards for the Press Conference at Upton Park, London.

Dereck Chisora poses for the photographer after the Press Conference at Upton Park, London.

David Haye (left) and Dereck Chisora (right) during the Press Conference at Upton Park, London.

Boxer David Haye with fence keeping him away from Dereck Chisora during the Press Conference at Upton Park, London.

Promoter Frank Warren at Upton Park, London.