Michael Thompson, Chris Kirk, Webb Simpson and Jordan Spieth have finished tied at the top at the end of the first day's play in the Hyundai Tournament of Champions.
The American quartet posted 66 at the Plantation Course in Maui to reach seven-under-par, one better than compatriots Ryan Moore, Kevin Streelman, Jason Dufner and Zach Johnson.
Matt Kuchar (-5) is on his own in ninth, followed by Sang-Moon Bae (-4) - the only non-American in the top 10.
Brandt Snedeker, Dustin Johnson and Adam Scott are part of a seven-strong group on three-under-par, while only three players in the 30-man field were unable to post red figures.
Jimmy Walker (E), Jonas Blixt (+3) and Derek Ernst (+6) will be looking to improve on their second trip, although they need not fear missing the cut.
