Viktor Hovland is alone atop the Hero World Challenge leaderboard after Friday's second round, following his opening 69 with a two-under 70 to enter the weekend at five under.
Hovland, who was the joint-leader entering the day, is the reigning champion at the event after edging Scottie Scheffler by one stroke at Albany Golf Course in the Bahamas last year.
In an action-packed second round, the Norwegian posted an eagle with four birdies and four bogeys, with his slam-dunk shot of the day on the par-five sixth hole making it back-to-back rounds with an eagle.
He is one stroke clear of a four-man group consisting of Scheffler, Xander Schauffele, Cameron Young and Collin Morikawa, with playing partners Scheffler and Schauffele posting four-under 68s to tie for the round of the day.
South Korean 20-year-old Tom Kim is the only player in sixth at three under, Justin Thomas is alone at two-under, and Billy Horschel is tied with Tiger Woods' late replacement Sepp Straka for eighth at one under.
It leaves 11 of the 20-player field at least five strokes off Hovland's lead, with Matt Fitzpatrick, Tony Finau and Jon Rahm at even par.
It was a day to forget for Tommy Fleetwood, Corey Conners, Max Homa and Shane Lowry, with all four shooting their way out of contention with rounds of four over or worse.