Taking three minutes to size up his challenge, Golovkin exploded into action and delivered a concussive conclusion that had Martirosyan marveling at the weapons that had just laid waste to him.

It was a rougher night than Cecilia Braekhus expected, as she had to get up off the canvas to win a unanimous decision over Kali Reis in HBO?s inaugural women?s bout.

Vanes Martirosyan enters his bout with Gennady Golovkin as a massive underdog, but could "The Nightmare" end up haunting GGG?

Since 2010, Golovkin has made 19 successful middleweight title defenses and his bout against Matirosyan could bring him level with the all-time record, set by Bernard Hopkins between 1995 and 2005.