In a star-studded field including world number one Jason Day, Jordan Spieth and Rory McIlroy, Dustin Johnson stole the show as he earned a one-stroke lead after the opening round of the Memorial Tournament.
All eyes were on the world's top three on day one at Muirfield Village Golf Club in Dublin, Ohio and while Day started well, American Johnson produced a putting masterclass en route to an almost flawless eight-under-par 64 on Thursday.
Johnson - without a PGA Tour win since last year's WGC-Cadillac Championship - holed 10 birdies and dropped just two shots.
He opened the day with three consecutive birdies and matched that feat again from the seventh to the ninth, before he posted four in a row, starting at the 12th following the turn.
Fellow American Brendan Steele is a shot further back.
Rain sprinkled the course throughout the afternoon, but the thunderstorms threatening on the radar never disrupted play. The result was a number of low scores with the course playing softer than normal.
Day was one of those players to benefit from the soft greens, with the Australian star firing a first-round 66, spurred by an eagle at the par-five 15th.
Hudson Swafford, Danny Lee, Matt Kuchar and David Hearn are also six under heading into the second round, with Jason Bohn, Kevin Streelman, Luke Donald, Emiliano Grillo and Ryan Ruffels a shot back.
Defending champion David Lingmerth is four under the card.
Meanwhile, world number two Spieth is six strokes off the pace.
In a topsy-turvy round, Spieth mixed five birdies with three bogeys to be a shot better off than rival McIlroy.
McIlroy registered a similar round to Spieth, holing six birdies and three bogeys, though he did double-bogey the 16th.