WBA/WBC/IBF middleweight champion Gennady Golovkin (36-0, 33 KOs) scored a fifth round stoppage over IBF welterweight champion Kell Brook (36-1, 25 KOs) on Saturday night at the O2 Arena in London.
Golovkin rocked Brook with a hard left hook in the first, but the British challenger recovered well and landed some shots of his own late in the round.
Brook landed several punches throughout the fight,but they never seem to affect Golovkin.
Good two-way action continued in rounds 2 and 3, but by…