World number one Jason Day birdied two of the last three holes to seize a one-stroke lead over David Lingmerth after the second round of the World Golf Championships Bridgestone Invitational. Australian Day, preparing for the British Open in two weeks and readying to defend his first major title in the PGA Championship at the end of the month, fired a one-under par 69 to stand on four-under 136 after 54 holes at Firestone Country Club in Akron, Ohio. Sweden's David Lingmerth was second on 137 with Argentina's Emiliano Grillo and Americans Scott Piercy and William McGirt on 138 and Australia's Adam Scott joining world number two Jordan Spieth and fellow Americans Kevin Kisner and Justin Thomas on 139.
