The generation gap may also shed light on how Fight the Big Bull has made some of today's most exuberant and relevant improvised music.

NPR: Fight The Big Bull: Rumpus In Richmond

The 36-year-old stepped up to the light-heavyweight division to fight Bernard Hopkins in Las Vegas in April where his points victory won Calzaghe the prestigious Ring Magazine title.

BBC: Calzaghe ready to cement legacy

Jones admitted the fight would be his last as a light-heavyweight and that he was hoping to line up just one more fight - with Mike Tyson.

BBC: Jones (right) edged out Tarver in a close bout