gennady golovkin
![](https://a.espncdn.com/media/motion/2016/0911/dm_160910_box_ggg_brook_hl9/dm_160910_box_ggg_brook_hl9.jpg?w=660&r=16%3A9)
Gennady Golovkin wins after Kell Brook's corner throws in towel
Gennady Golovkin got a tougher challenge than expected, but he still scored his 23rd straight KO when Kell Brook's team threw in the towel in the fifth round of their fight Saturday in London.