Defending champion Scottie Scheffler holds a two-shot lead after the second round of the Hero World Challenge following a stunning 64 on Friday.
The 28-year-old American made eight birdies in a bogey-free round, seven of them on the front nine, to finish on 13 under at the Albany Golf Club in the Bahamas.
“[I was] just trying to keep my foot down on the pedal,” said Scheffler.
“It was good. I did a lot of good things. Front nine was really nice and then the back nine I felt like I did some good things as well.”
Compatriots Justin Thomas and Akshay Bhatia share second on 11 under, with US 2025 Ryder Cup captain Keegan Bradley two shots back in fourth place.
Cameron Young, who led by two shots after day one, stumbled after a second-round 75 for a share of 10th spot.