Jason Day is relishing the major-like challenge despite blowing a hot start to the Wells Fargo Championship, the PGA Tour's $US20 million ($A30 million) signature event in North Carolina.
Xander Schauffele fired a seven-under-par 64 to claim a three-shot first-round lead, with Day's 68 leaving Australia's former world No.1 in a seven-way share of fifth.
Day opened eagle-birdie to be three under through two holes, but rued cooling off as two bogeys offset two more birdies at Quail Hollow.
