Jason Day and Scott Piercy share a one-shot lead after the third round of the WGC-Bridgestone Invitational.
Firestone continues to be a test for players, but Piercy managed a three-under 67 to join world number one Day (69) atop the leaderboard on Saturday.
The duo sit at five under, a shot clear of Swede David Lingmerth (69) in Akron, Ohio.
U.S. Open champion Dustin Johnson produced the best round of the day - a 66 - to be within three strokes of the lead.
Day held the overnight lead, but he could only hit three fairways throughout his round, yet still managed a 69.
"I hit some pretty errant shots out there today, but the short game saved me," the Australian told CBS Sports.
Day added: "There's obviously a lot of negatives that you can look at this round with regards to my hitting.
"The positive is that I'm still tied lead and I haven't hit the golf ball that great this week.
"If I can stick to that, and think about that, if I can hit it anywhere sort of decent tomorrow and give myself a few more opportunities on the greens I feel I've got a very good chance of winning."
Despite his struggles, Day had three birdies and two bogeys to remain in a share of the lead.
Piercy had an eagle at the par-five second, holing out from the bunker to make a great start to his round.
Only a bogey at the last cost him an even better round, but he is set to challenge Day.
Brian Stuard (67) is outright fourth at three under, a shot clear of Johnson, William McGirt (70) and Charl Schwartzel (67).
Jordan Spieth (71) is at even par and will need a huge finish to have any chance of challenging, while Adam Scott (73) slipped back to two over.