Adam Scott has shot a four-under 66 to hold a one-shot lead going into the final round of the WGC Bridgestone Invitational at Firestone Golf and Country Club.
Australian Scott, 31, has led the tournament after each of the first three rounds.
World number one Luke Donald is a further shot back after shooting the joint lowest round of the day - a six-under 64.
"I hit the ball really nicely and finally made a few more putts, which was nice to see," said Donald.
"I just tried less - as simple as that. Sometimes you can get over-analysing things."