Kell Brook v Gennady Golovkin: Brook wants to be ‘best boxer in world’

Kell Brook believes beating Gennady Golovkin would be the greatest ever victory by a British boxer.

Brook, the IBF welterweight champion, is jumping two weights to challenge for Golovkin’s WBC and IBF middleweight titles on Saturday.

Read more: http://www.bbc.com/sport/boxing/37295754