Jason Day had little trouble in completing up a wire-to-wire victory at the BMW Championship in Illinois by six shots and become world No 1 for the first time in his career.
Day did most of his damage on the opening two days, when he reached halfway he was 18 under, and even a couple of less impressive rounds on the weekend never looked like stopping him.
The Australian parred his first seven holes before making a birdie at the par-five eighth, but he gave that shot straight back at the ninth.
He picked up another shot at the 16th and moved to 22 under at the last, where a sublime pitch from the rough left him with a couple of feet for yet another birdie.
None of his biggest rivals was able to mount a serious Sunday challenge, Day extending his lead to seven at one point, and it would be left to youngster Daniel Berger to claim second place.
Berger claimed the most lucrative cheque of his career thanks to a superb back-nine performance at Conway Farms.
JB Holmes, Rickie Fowler and soon to be former world No 1 Rory McIlroy to share fourth, with McIlroy holing a putt at the last to move to 14 under alongside the pair of American players.
But they were all left in Day’s wake as he claimed a fourth win in his last six tournaments – his next challenge is to produce a good enough result at East Lake to win the $10m bonus as play-off champion. Last year’s winner Billy Horschel failed to make the top-30 this time around.