World number one Scottie Scheffler will take a five-shot lead into the final round of the season-ending Tour Championship.
After a slow start, the American finished his third round strongly with birdies on four of the final five holes.
They helped Scheffler to card a 66 for a 26-under-par total and sit five strokes ahead of compatriot Collin Morikawa.
Morikawa had reduced the deficit to two shots on the front nine but Scheffler recovered with back-to-back birdies on the seventh and eighth.
“I’ve had my chances here to win some tournaments and I’ll have no better opportunity than Sunday,” said Scheffler, who is bidding for his first FedExCup title.
“I’ve been mentally at my best this year and I’m looking forward to doing more of that tomorrow.”
Morikawa finished strongly, too, with birdies on three of his last four holes to stay in touching distance of Scheffler.
“It’s going to be very hard but I believe in myself that I can do it,” said Morikawa.
“I’ve got 18 holes left to the season – I’m going to put everything I have into these next 24 hours.”
The biggest mover was Sahith Theegala, who finished with five consecutive birdies to move into third place ahead of Xander Schauffele on 17 under.
The winner of the Tour Championship will claim prize money of £19m.