Adam Svensson fired an opening 60 to take a two-shot lead in the Black Desert Championship in Utah.
The Canadian carded nine birdies and holed a 35-foot eagle putt on the seventh – his 16th hole – to christen the new Black Desert Resort course.
His round follows England's David Skinns opening the Sanderson Farms Championship with a 60 last week, where he missed a putt on the last for a 59, before falling back through the field.
Sweden’s Henrik Norlander and Matt McCarty, playing only his second PGA Tour event, were two shots behind Svensson after opening with nine-under-par rounds of 62.
On a day of low scoring, Americans Kevin Streelman and Sam Ryder were a further two strokes behind.
England’s Harry Hall was in a large group on six under alongside Ben Kohles, who holed in one on the 130-yard 17th hole.
Seamus Power finds himself closer to last than first on one over after a round which included three birdies, two bogeys and a double bogey.
Play was halted due to failing light with eight groups still out on the course.
