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Dustin Johnson won the U.S. Open at Oakmont by three shots, following a dramtic and controversial final round in which Ireland's Shane Lowry let slip a four-shot lead.

Johnson carded a closing 69 to finish four under par, but only after belatedly being given a one-shot penalty following an incident which left players, officials and spectators unsure of his score with just seven holes to play.

The world number six began the final round four shots behind Lowry, but moved two clear of the field with birdies on the second and ninth coupled with four bogeys in the first 10 holes from Lowry.

The victory sealed a first major title for Johnson.

This clip is from 5 live Sport, Sunday 19 June 2016.