South Africa's Louis Oosthuizen plays a shot on the 17th during the first round of the British Open at Royal St George's in England, on Thursday, July 15.
Louis Oosthuizen finished the first round with a six-under par 64.
United States' Jordan Spieth putts on the sixth hole.
Jordan Spieth hits his tee shot on the third hole on his way to an opening round 65.
United States' Jordan Spieth, left, and countryman Bryson DeChambeau on the 18th green. DeChambeau finished with a disappointing one-over 71.
Brian Harman of the US finished with an impressive 65 on Day 1.
US golfer Stewart Cink on the 10th tee on his way to a first-round 66.
Spain's Jon Rahm reacts after missing a putt on the 17th green. The reigning US Open champion finished with a first-round 71.
England's Justin Rose plays his second shot on the 18th. He finished with an opening-round 67.
Dustin Johnson of the US on the eighth green. He finished with a first-round 68.
Northern Ireland's Rory McIlroy on the first tee.
Phil Mickelson of the United States on the fourth tee.