Jordan Spieth rolled in a 50-foot birdie putt on the last hole to cap off a Saturday at Isleworth that was close to perfect.
Spieth opened with three straight birdies and wound up with a 9-under 63. That gave the 21-year-old Texan a seven-shot lead over Keegan Bradley and Henrik Stenson going into the final round of the Hero World Challenge.
Spieth is coming off a six-shot victory last week in the Australian Open, so his game travels well.
He played bogey-free to reach 20-under 196.
Bradley had a 65, while Stenson overcame a slow start to post a 68.
Tiger Woods had a fever and nausea, but he rallied late with three straight birdies for a 69. He was in last place, 20 shots behind.