BOXING'S FOUR KINGS - Part Four: JEFF POWELL MBE on Tommy Hearns' eight-year revenge mission against Sugar Ray Leonard ending in a draw, but what happened after the fight cemented them in the sport's golden age?

JEFF POWELL MBE: The nostalgia reflex is being triggered by the imminent clash between two undefeated Russian titans for the undisputed world light-heavyweight title on Saturday.