Gary Player joined Jack Nicklaus in getting the 83rd Masters underway. Player and Nicklaus continued their role as honorary starters by each hitting a tee shot on the opening hole, with 83-year-old Player producing the longer - and more accurate - drive by around 30 yards from 79-year-old Nicklaus. With the formalities out of the way, Tiger Woods finished his opening round at the Masters with a 2-under 70. Koepka made five birdies in six holes from the 10th on his way to a 6-under 66 that was matched by his fellow American Bryson DeChambeau. Phil Mickelson, who would be the oldest major winner in history if he claims a fourth green jacket at the age of 48, also birdied five of the last seven to lie one shot off the lead, with Ian Poulter and Dustin Johnson a shot further back. Rory McIlroy, who needs to win the Masters to complete a career grand slam, was joint 44th after an opening 73.