Justin Thomas carded an eight-under 65 to share the lead after the opening round of the Tournament of Champions on Thursday.
Two-time champion Thomas produced a bogey-free first round that included eight birdies in Kapalua, Hawaii.
The world number three, winner of the event in 2017 and 2020, made five birdies on the front nine and three on his final five holes.
Thomas shares a two-stroke lead with Harris English in the first PGA Tour event of the year.
The highlight of English's round was an eagle at the ninth hole, where he chipped in from just off the green.
On what is a congested leaderboard, six players are tied for third at six under.
Sergio Garcia, Robert Streb, Nick Taylor, Ryan Palmer, Im Sung-jae and Patrick Reed all opened with 67s.
Garcia won the tournament in 2002, while Reed was victorious in 2015 and has two runner-up finishes since – including last year.
Adam Scott, Patrick Cantlay and Brendon Todd carded five-under 68s.
World number one Dustin Johnson is back in a tie for 30th after opening with a 71, while Jon Rahm carded a 70.