|WGC Bridgestone Invitational third round leaderboard|
|-6 D Johnson (US); -5 S Piercy (US); -3 J Day (Aus), J Spieth (US), M Kuchar (US), K Chappell (US)|
|Selected others: +2 P Casey (ENG); +4 P Mickelson (US); +10 J Rose (Eng)|
Dustin Johnson shot a four-under-par 66 to win the WGC Bridgestone Invitational after world number one Jason Day endured a torrid finish.
The Australian went into the final round tying with Scott Piercy at the top of the leaderboard but finished three behind US Open winner Johnson after a bogey on 15 and a double on 16.
American Piercy finished in outright second after a birdie on 18.
Jordan Spieth shot a three-under 67 to finish tied for fourth.
We've launched a new BBC Sport newsletter, bringing all the best stories, features and video right to your inbox. You can sign up here.