Kell Brook will go head to head with Gennady Golovkin at London’s O2 Arena on Saturday night.

The 30-year-old stepped up two weight divisions to middleweight to challenge the IBF and WBC champion, the fighter considered the most dangerous in the sport.

Kazakhstan’s Golovkin has never been taken beyond 11 rounds and has stopped 32 of his 35 opponents.

Brook will fight 13lbs above the division in which he has built his reputation, but remains confident despite his wariness of the task ahead.