Australia's Jason Day created history, and prevented Jordan Spieth from doing so, by ending a run of near-misses with a brilliant first major victory in the U.S. PGA Championship at Whistling Straits in Sheboygan, Wisconsin on Sunday.
Day scored a final round of 67 to become the first player to finish a major on 20 under par, beating the previous record of 19 under set by Tiger Woods in the 2000 Open at St. Andrews.
The 27-year-old was in tears even before tapping in for par on the 18th, where he was embraced by his caddie and mentor Col Swatton, son Dash and wife Ellie, who is pregnant with the couple's second child.
American Spieth was looking to become only the third player after Woods and Ben Hogan to win three majors in a season, but a closing 68 meant he finished three shots behind and had to settle for overtaking Rory McIlroy to become the second youngest world No. 1 ranked player behind Woods.
The 22-year-old Spieth also finished a remarkable 54 under par for the year's four majors, one better than Woods in 2000 when he won the U.S. Open, British Open and the U.S. PGA.
Spieth had started the day brightly and birdied three of the first six holes, but a long birdie putt from Day at the next hole moved the Australian to 19 under par and provided some breathing room from his playing partner for the round.
Day's final birdie of the day came on the par five 16 and put him a record-breaking 20 shots under par.
South Africa's Branden Grace finished third on the leaderboard at 15 under par while England's Justin Rose came in fourth place going 14 under.
Indian Anirban Lahiri tied for fifth with American Brooks Koepka at 13 under par for the tournament.