The world number one is currently 36-year-old American Nate Campbell, who recently beat Juan Diaz for the WBA, WBO and IBF titles.

BBC: Thaxton gets title shot incentive

Calzaghe, unbeaten in 45 bouts, was king of the super-middleweight division - holding the WBC, WBA and WBO titles - but The Ring light-heavyweight crown he won by beating Hopkins was to be on the line against four-weight world champion Jones.

BBC: Calzaghe postpones Jones Jr fight

The recognised world titles at the weight are held by Jean Pascal (WBC), Tavoris Cloud (IBF), Gabriel Campillo (WBA) and Juergen Braehmer (WBO).

BBC: Nathan Cleverly helped to title by leaving Calzaghe gym