Vincent Norrman has shot a seven-under par 65 to capture a one-stroke victory at the inclement weather-delayed Irish Open while more fancied contenders, including Rory McIlroy and Min Woo Lee, stumbled at The K Club.
Swede Norrman, who improved 20 spots over the final 18 holes on Sunday, shot a bogey-free round to finish on 14-under 274 for the prestigious European Tour event in County Kildare.
His pursuers included third-round leader Hurly Long of Germany, whose even-par round of 72 had him finish at 13 under, and favourite McIlroy, whose surprisingly poor 74 ensured he fell 13 spots down the leaderboard to tie for 16th.
Australia's Min Woo Lee had briefly looked in shape to challenge for the title as he moved to just one shot behind the leaders after a blistering start but he slipped back after the turn to shoot a 70 and finish tied for seventh at 11 under, three shots adrift.
Norrman carded his only unblemished round of the tournament, following rounds of 68, 71 and 70 with seven birdies on Sunday, including at the par-five 18th hole for the third time.
"It means everything," Norrman said of his second European Tour title in his 14th appearance.
"Obviously, such a cool event to play. The fans have been incredible. I've really had a fun week."
Norrman, who also won July's Barbasol Championship in a playoff in Kentucky, added: "The front nine was huge. I was playing so-so and then I birdied the seventh and ninth to get some momentum going into the back. I think that was key today.
"It's a world-class event, and honestly I can't believe it's happened."
Four players tied for third at 12 under - Scotland's Grant Forrest (70), New Zealander Ryan Fox (70), South African Thriston Lawrence (66) and Ireland's 2009 champion Shane Lowry (68).