U.S. Open: Koepka showing what is possible at Oakmont

The final round of the U.S. Open got off to an eventful start on Sunday as Brooks Koepka produced a stunning run of holes to put a major record within reach.

No player has ever shot lower than 63 in one of golf's premier strokeplay events and few would have anticipated anyone going close to that number this week at Oakmont, a course famed for its difficulty.

However, after two early bogeys at the start of his fourth round, Koepka surged up the leaderboard by picking up eight strokes in his next eight holes.

Birdies at the fourth, fifth, sixth, seventh and ninth lifted Koepka to three under for the day and one over for the tournament - eight behind leader Shane Lowry, who had yet to tee off.

Yet there was even more to come from the American as he holed out for eagle on the 10th from 108 yards, before chipping in off the fringe at 11 for yet another birdie.

At six under for his round with seven holes of the par-70 course to play, Koepka needed to pick up two more shots in order to shoot the first 62 in major history.

Koepka came into the U.S. Open with runner-up finishes in his last two starts, making him a popular pick entering the week. Though he struggled early in the tournament, it appeared he was on a mission on Sunday.

Lowry, who led Dustin Johnson and Andrew Landry by four strokes, was due out at 3:30pm local time (8:30pm BST).