GGG stops Rolls with massive 4th-round KO

Gennady Golovkin made sure there would not be a repeat of Andy Ruiz Jr.'s massive upset over Anthony Joshua, knocking out Steve Rolls in...

Gennady Golovkin made sure there would not be a repeat of Andy Ruiz Jr.'s massive upset over Anthony Joshua, knocking out Steve Rolls in the fourth round Saturday.

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