Scottie Scheffler is in the driving seat as he targets a first FedEx Cup title, taking a five-shot lead into the final day at the Tour Championship. (More Sports News)
The world number one made a slow start on Saturday but recovered to finish strongly with four birdies on the final five holes to maintain his lead, as he carded 66, moving his total to 26-under.
Scheffler is aiming to win his seventh PGA Tour event of the season at East Lake, with Collin Morikawa closest to him in second having carded a 67 in the third round.
"I've had my chances here to win some tournaments, and I'll have no better opportunity than Sunday," said Scheffler.
"I've been mentally at my best this year, and I'm looking forward to doing more of that in the last round."
Morikawa played himself into contention on Friday and was able to keep the pace with birdies on three of the last four holes on Saturday, while Xander Schaffuele slipped down to fourth, 10 shots off the top, with Sahith Theegala above him on 17-under.
After Morikawa's strong finish on Saturday, he remains hopeful that he will get a stroke of luck on Sunday to pip his compatriot to the title.
"It's going to be very hard, but I believe in myself that I can do it," Morikawa said.
"Five shots is a lot, but two-shot swings happen. I think I've seen a couple over the past few days.
"I've just got to play my game. I've got to go low. I've got 18 holes left in the season - I'm going to put everything I have into these next 24 hours."