NEW YORK: Former unified middleweight champion Gennady Golovkin turned back the clock on Saturday night (Sunday in Manila) with a sensational fourth-round knockout of Steve Rolls in their super middleweight fight at Madison Square Garden.

The 37-year-old Kazakhstan fighter hit Rolls with a short left that sent the Canadian crumbling face first to the canvas with one minute to go in the fourth in front of a crowd of 12,357.