Haye-Chisora fight explained

David Haye and Dereck Chisora are set to meet in a heavyweight boxing clash at West Ham's Upton Park on Saturday, 14 July.

The British heavyweights were involved in a brawl following Chisora's defeat by Vitali Klitschko in Munich in February.

The pair do not have licences to fight in Britain but the bout has been authorised by the Luxembourg Boxing Federation.

BBC Sport looks at how and why the fight has been allowed to happen.