Gennady Golovkin successfully retained his WBC, IBF and IBO middleweight titles Saturday, stopping Kell Brook in the fifth round. The bout took place in London from The O2 Arena.
With the win, Golovkin improved to 36-0 with his 17th successful title defense. The loss was the first for Brook in his 37-fight career.
Later that night on HBO, Roman Gonzalez defeated Carlos Cuadras via decision.