Kell Brook says he can maintain his speed and bring power to the ring when he steps up to middleweight to fight Gennady Golovkin on 10 September.
Brook, 30, is the IBF welterweight champion and is moving up two weight divisions to take on the Kazakh boxer.
“I’m going to bring the speed up to the middleweight division,” Brook said.
“I’m going to bring big power as well. I’m ready for this fight. To be the best you’ve got to beat the best – it doesn’t get any bigger than GGG.”