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Masters champion Adam Scott stormed back from four shots behind with 10 holes remaining to clinch the four-man PGA Grand Slam of Golf by two strokes in Bermuda on Wednesday.
The Australian, who had trailed by three after the opening round, eagled the par-five 17th to forge two ahead of overnight leader Justin Rose, then parred the last for a course record seven-under-par 64.
Scott posted an eight-under total of 134 at the Port Royal Golf Course in the elite 36-hole event which brings together the winners of the year's four majors.
US Open champion Rose, who had been four ahead after making four consecutive birdies from the fourth, faded with bogeys on two of the last 10 holes on the way to a 69 and second place at six under.
PGA Championship winner Jason Dufner was a further three strokes back after closing with a 70 while defending champion Padraig Harrington of Ireland (71) finished at three over.
Harrington, a three-time major winner, was a late replacement in the field after British Open champion Phil Mickelson chose not to play.