Golokvin to fight 'an animal' in Kell Brook in London

NEW YORK (AP) Middleweight world champion and rising star Gennady ''GGG'' Golovkin says a fight against welterweight champ Kell Brook in September will be the biggest test of his career.

Golovkin said Thursday that Brook is strong and the best in his division. Brook is moving up two weight classes to face Golovkin, perhaps the most feared active fighter in boxing because of his highlight knockouts.

Golovkin and Brook fight Sept. 10 at London's O2 Arena.

Describing himself as ''an animal,'' Brook says he's excited to have the challenge and that he has ''a leap and a step to this fight.''

The fight will be televised on Sky Box Office pay-per-view in Britain and on HBO in the United States.